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PubMed1989

Motivational control of sexual behavior in Aplysia fasciata: sequencing and modulation by sexual deprivation and by addition of partners.

Variables similar to those affecting feeding behavior also modulate sexual behavior in Aplysia fasciata, indicating that mating is under motivational control. Motivated behaviors are often patterned into appetitive and consummatory components. Courtship, the appetitive phase of male sexual behavior, was temporally related to subsequent mating. Although many bouts of courtship failed to lead to mating, most incidents of mating were preceded by courtship. Motivation is also characterized by satiation after the goal of the behavior is achieved. We found an increase in likelihood to mate following a period of sexual isolation. Motivated behaviors are also modulated by environmental stimuli that induce arousal. Time spent mating was found to be a function of the number of potential mates accessible for mating. Number of A. fascinata participating in a mating group was also found to be a function of number of potential mates available.

Animals↗

PubMed2004

Sexual behavior of secondary school students in Bangkok metropolis.

OBJECTIVE: To explore sexual behavior in terms of masturbation, homosexual contact and coitus in secondary school students in Bangkok. MATERIAL AND METHOD: This was a cross-sectional survey research from December, 2002 to January, 2003. 362 students were selected by the multistages simple random sampling technique. A self administered questionnaire was used to collect data on baseline characteristics and sexual behavior of the students. RESULTS: 197 male and 165 female students were enrolled in the present study. The mean age was 16.5 years, and 65.7 percent of the students were exposed to sexually explicit contents via the internet. 58.0 percent of the students used the internet for pornographic viewing. According to the sexual behavior of the students, 79.2 percent of the males and 9.1 percent of the females had experience in masturbation (p < 0.05). The male had a slightly higher in homosexual contact than the females (10.2% vs 9.1%) but coital experience of the males was markedly significance higher than the females (25.4% vs 7.9%) (P < 0.05). CONCLUSION: It was concluded that sexual behavior in the internet era; males had more experience in all these categories than females. Sexual education via the internet should be improved in order to make adolescents understand appropriate sexual behavior and practice safer sex.

Adolescent↗

PubMed2003

Assessment and treatment of compulsive sexual behavior.

The hallmarks of compulsive sexual behavior (CSB) are recurrent and intense sexually arousing fantasies, sexual urges, and behaviors that cause individuals distress in daily functioning. Clinical signs of CSB can include anxiety, depression, somatic complaints, alcohol or drug use or dependency, relationship problems, or signs of abuse. This article describes the symptoms of paraphilic and nonparaphilic CSB and discusses their epidemiology, etiology, as well as comorbid psychiatric conditions. It also presents screening questions that clinicians can use with patients suspected of having CSB and outlines medical and psychiatric treatment for the condition. When CSB is suspected, referral to a clinician experienced in treating sexual disorders is recommended.

Behavior, Addictive↗

PubMed2002

Sexual behavior of international travelers visiting Peru.

BACKGROUND: Sexual behavior of travelers to Latin America and the sexual behavior of US travelers in general are poorly characterized. GOAL: The goal of the study was to evaluate sexual risk factors of travelers to Peru. STUDY DESIGN: Anonymous written questionnaires were administered to 442/507 (87%) of the individuals approached in the international departures area of the Lima airport. RESULTS: Of the 442 respondents, 54 (12.2%) had new sex partners during their stay. Sex with a local partner (35/52; 67.3%) was more frequent than sex with other travelers (18/52; 34.6%) or with sex workers (4/52; 7.7%). Risk factors for a new sex partner included male sex (relative risk, 1.94), single marital status (relative risk, 2.59), duration of stay longer than 30 days (relative risk, 5.05), traveling alone or with friends (relative risk, 2.88), and bisexual orientation (relative risk, 4.94). Frequency of sexual activity among US travelers was greater than that among travelers from other countries (15.2% [22/145] versus 10.6% [30/282]; NS). Condoms were consistently used by 12/50 (24%) and sometimes used by 10/50 (20%), including 8/20 United States travelers and 13/29 travelers from other countries. CONCLUSION: Behaviors and risk factors are similar to those described for travelers to Africa, Asia, and Eastern Europe. Behavior of US travelers did not differ from that of other travelers.

Adolescent↗

PubMed1997

Cholinergic-androgenic interaction in the regulation of male sexual behavior in rats.

It is well known that testosterone (T) plays a major role in the adequate expression of male sexual behavior. On the other hand, the stimulation of central muscarinic receptors with oxotremorine (OXO), a specific agonist, facilitates the expression of masculine sexual behavior in rats. In this study, we analyzed the relationship between T and the cholinergic system, recording the effect of OXO administration on masculine sexual behavior in gonadectomized rats, before and after receiving T treatment. Sexually experienced and unexperienced male rats were gonadectomized and periodically tested for sexual behavior. Once this behavior was absent or drastically reduced, males were treated with OXO or saline and sexual behavior was assessed. 112 or 167 days later, animals were treated daily with T during 21 days, recording the response to OXO in days 12 and 21. Sexual behavior decreased more rapidly after gonadectomy in inexperienced males. OXO administration did not improve sexual performance in either group. The administration of T rapidly restored sexual behavior of experienced males: recovery of inexperienced males was slower. In the presence of T, OXO administration exerted a facilitative effect on sexual performance of both groups. These results suggest that the facilitative effect of muscarinic stimulation on sexual behavior requires the presence of testosterone.

Acetylcholine↗

PubMed1989

Sexual behavior in women with nonalcoholic liver disease.

Sexual behavior in women with liver disease was examined in 150 women to determine whether liver disease influenced sexual desire, frequency or performance. The average age of women studied was 53 years (range: 26 to 76 years), and a wide variety of liver diseases were represented. Sexual desire was reduced in 33%. Difficulty in becoming sexually aroused was noted by 18%. Orgasm during intercourse was not experienced by 25%. The frequency of sexual intercourse decreased since onset of disease in 27%. Dyspareunia was a complaint by 21%, most often attributed to decreased vaginal lubrication. Liver disease was considered a significant factor interfering with sexual function in 17%. No statistical difference was found between sexual desire or function in our study and in large studies of sexual behavior in women. Each category was subdivided by presence or absence of cirrhosis, pre- or postmenopausal state, laboratory values and duration of disease. Except for a greater number of postmenopausal women with complaints of painful intercourse, no statistical differences or trends were found. Nonalcoholic liver disease does not affect sexual desire, function or performance. Variables other than liver disease influence sexuality. Women with liver disease can thus be reassured that they can maintain normal sexual relations.

Adult↗

PubMed1998

Effects of sexual behavioral manipulation on brain plasticity in adult rats.

The purpose of the present study was to determine the effects of sexual behaviorial manipulation on brain plasticity in adult male rats. Adult male Sprague-Dawley rats that copulated during male sexual behavior testing were divided into four groups: control male; gonadectomized (Gdx) male; sexually active male; and sexually nonactive male. Female animals were used as an additional control group. At the end of a 12-week experimental period, the animals were again tested for male sexual behavior and tested for sexual motivation. Sexual behavior manipulations over the 12-week period resulted in significant differences in mount latency, mount frequency, intromission latency, intromission frequency, ejaculation latency, and the postejaculation interval. In the motivation test, significant differences in the number of approaches, contacts, and crossings of an electrified grid separating the test animal from a receptive female were also observed. Sexually dimorphic nucleus of the preoptic area (SDN-POA) volumes in sexually nonactive males were significantly smaller than in control males or sexually active males. Anteroventral periventricular nucleus (AVPV) volumes in the male groups were not significantly altered by sexual behavioral manipulations, however, the nonactive AVPV vol. was the only vol. not significantly different from the control female vol. These data demonstrate that in the adult rat, sexual behavioral manipulations resulted in significant alterations in behavior and in the vol. of the SDN-POA and that the effect of sexual behavior on the AVPV needs to be further investigated.

Animals↗

PubMed2002

Predictors of risky sexual behavior in African American adolescent girls: implications for prevention interventions.

OBJECTIVE: To describe empirically the risky sexual behavior of an at-risk sample of adolescent girls, to assess psychosocial correlates of risky behavior, and to examine the utility of applying a risk and protective model to predicting teens' risky sexual behavior. METHOD: Participants included 158 African American girls, ages 12 to 19, who were receiving medical care in an adolescent primary care clinic. Teens completed measures of depression, conduct problems, substance use, peer norms, social support, HIV knowledge, sexual self-efficacy, and sexual behavior. RESULTS: Teens in this sample reported high rates of risky sexual behaviors, including early sexual debuts and frequent unprotected sexual encounters with multiple partners. African American girls who reported high rates of substance use and who reported that their peers engaged in risky behaviors also reported engaging in high rates of risky sexual behaviors. Little support was obtained for protective factors (HIV knowledge, social support, sexual self-efficacy) moderating the relations between risk factors and adolescents' risky sexual behavior in this sample. CONCLUSIONS: Teens presenting in primary care settings in urban environments seem to be at high risk for HIV, STDs, and substance abuse, and risk reduction strategies should be introduced during the preteen years. An interdisciplinary model of care in primary care settings serving adolescents is clearly indicated, and prevention-oriented interventions aimed at reducing risky behaviors and preventing the development of more significant health, mental health, or substance abuse disorders are needed.

Adolescent↗

PubMed1996

Increased use of condoms among female university students: a 5-year follow-up of sexual behavior.

OBJECTIVE: To ascertain any changes in sexual behavior and attitudes as an indication of the impact of intensified information activities aiming at decreasing the risk of spread of sexually transmitted diseases among university students. METHODS: In 1989 questionnaires were offered to 275 consecutive female students visiting the Student Health Center. Identical questionnaires were mailed to 200 randomly selected women registered at Uppsala University. The study was repeated in 1994. The study was carried out in Uppsala, a city in Sweden with 27,000 university students. RESULTS: At the Student Health Center 241 (88%) participated in the study in 1989 and 262 (95%) in 1994. Corresponding figures in the postal survey were 137 (69%) in 1989 and 151 (76%) in 1994. Compared with the findings in 1989, in 1994 the sexual behavior was unchanged in terms of mean age at first intercourse (17.6 years), median number of life partners (3-4) and median number of sexual partners during the last 12 months (1), but the awareness of sexually transmitted diseases had increased. Their attitudes to using condoms had become more positive and the actual use of a condom had also increased both at the first intercourse and when changing partner, from 40 to 60%. Concerns about safety of oral contraceptives decreased significantly. CONCLUSIONS: This follow-up shows that awareness of sexually transmitted diseases and condom use had increased between 1989 and 1994, possibly as a result of intensified information efforts.

Adolescent↗

PubMed2003

Assessment of knowledge and practice of high risk sexual behavior at a private Midwestern University.

In the United States, an estimated 15.3 million new cases of sexually transmitted infections (STIs) occur each year. Approximately two-thirds of people who acquire STIs in the U.S. are younger than 25 years of age. In addition, approximately 57% (3.1 million) of all pregnancies in the United States are classified as unintended. It is only logical that the consequences of high-risk sexual behavior (unintended pregnancy and contraction of an STI) would most affect those who exhibit high-risk sexual behavior. Thus, one would expect to find high-risk sexual behavior in the same populations that have high rates of STIs and unintended pregnancy. The purpose of this study was to survey freshman students living in the residence halls at a local college to assess their knowledge and the prevalence of high-risk sexual behavior, and give feedback to the participating institution about these results. The survey was designed to answer two questions: (1) What is the current level of high-risk sexual behavior at a small private Midwestern College? (2) What is the current level of knowledge about high-risk sexual behaviors of those surveyed? A total of 38 men and 131 women participated in the survey. Forty-seven percent of men and 41% of women respondents reported having sexual intercourse at least once in their lifetimes. Of those respondents who were sexually active, 67% of men and 54% of women reported that they "always use a condom" with sexual activity. Fifty-six percent of men and 51% of women that were sexually active reported that they were "not at all concerned" about contracting an STI. Twenty-two percent of men and 17% of women answered that they were "not at all concerned" about pregnancy. Three true/false questions about STIs were answered correctly over 95% of the time by those surveyed. Seventy-nine percent of respondents reported never having attended educational opportunities about STIs and safe sexual practices at the college.

Adolescent↗

PubMed2007

Risky sexual behavior among women with protective orders against violent male partners.

The purpose of this study was to describe risky sexual behaviors among women with protective orders against violent male partners (N=673), as well as to examine associations of relationship factors, psychological abuse, severity of partner violence, sexual violence, and women's substance abuse with risky sexual behavior. An HIV sexual risk index was computed based on the participant's self-reported risky sexual behavior, the participants' estimations of the abusive partner's extra dyadic sexual behavior and the abusive partner's illicit drug use. The majority of women engaged in risky sexual practices and had partners who engaged in risky sexual practices. Results of OLS regression analysis showed that the participant's age, length of the participant's relationship with the abusive partner, severity of physical violence, substance abuse/dependence (alcohol and illicit drug) were significantly associated with risky sexual behavior. Implications for future research and HIV prevention interventions with partner violence victims are discussed.

Adult↗

PubMed2002

Promoting sexual health and responsible sexual behavior: an introduction.

Facing a myriad of sexual health problems today, health ministries are being compelled to develop comprehensive approaches to sexual health promotion. Recently, there have been several attempts to develop these strategies at national, regional, and global levels. One of the challenges of articulating strategies has been arriving at basic definitions of sex, sexuality, sexual health, and responsible sexual behavior. However, there is remarkable consistency throughout these recent documents. These documents call for leadership of the health sector to create better climates for discussion of sexuality, access to information and education about sexuality, prevention strategies, access to care, and more research in human sexuality and evaluation of programs designed to promote sexual health and responsible sexual behavior.

Health Knowledge, Attitudes, Practice↗

PubMed1986

Factors related to coercive sexual behavior in a nonclinical sample of males.

The sexual coercion literature has suggested numerous factors related to aggressive sexual behavior. The present investigation explores a number of these factors in a community sample. Data collected from 189 volunteers from the community included measures of sexual arousal, social perception, personality variables, attitudes toward women, and self-reported likelihood to rape. Multiple-regression analyses were used to determine the relative association of these factors to coercive sexual behavior. The present findings suggested that social perception, Extraversion and Neuroticism from the Eysenck Personality Inventory, sexual arousal, and self-reported likelihood to rape all contributed to the multiple regression. Rape Myth Acceptance, although not contributing significantly to the multiple regression, did show a significant zero-order correlation with coercive sexual behavior. Additional analyses were performed in an attempt to replicate an earlier predictive study by Malamuth and Check (1983) that found self-reported sexual arousal to be predicted by a combination of self-reported likelihood to rape, Psychoticism and Neuroticism from the Eysenck Personality Inventory, power motivation, and sexual experience. In the present study, both self-reported sexual arousal and penile tumescence measures were significantly related to attitudinal measures, social perception measures, and self-reported likelihood to rape. Limitations of the present study and suggestions for future research are discussed.

Adolescent↗

PubMed1985

Adolescence and sexual behavior. Trends and implications for STD.

Teenage sexual activity became more common in the 1970s, and that trend may continue in this decade. Teenagers have thus established themselves as an important component of the population at risk of sexually transmitted disease (STD). Adolescents exhibit many of the same features of sexual behavior seen in the adult population. However, adolescents' abilities to recognize, evaluate symptoms of, and seek treatment for STD are generally limited. Many teenagers are hesitant to admit that they have begun sexual activity or that something like STD could happen to them. The combination of these factors with generally liberalizing trends in sexual behavior in the last decade has elevated the risk of STD for teenagers and made the job of adolescent health care providers more difficult.

Adolescent↗

PubMed1992

The role of maternal stimulation in the development of sexual behavior and its neural basis.

Both sexual differentiation, which is a matter of individual development, and sexual dissimilation, which is a matter of individual differences, result from developmental processes that are open to input from the early maternal environment. There are reliable features in both the dam and the young that ensure that males receive more perineal stimulation from maternal licking than is necessary for survival and normal growth. This stimulation contributes toward the development of masculine sexual behavior and mechanisms in the central nervous system that control copulatory reflexes. Because of differences in signals that they produce, males receive more stimulation than females. This bias in early stimulation accounts for some of the dissimilarity between the sexes in nervous system morphology and behavior. The same processes that produce sex differences can also produce individual differences among males. These differences are likely to have significant functional consequences in rats, a species in which males have a high level of intrasexual reproductive competition. Future research will be directed toward testing this functional hypothesis and toward exploring the extent of stimulative effects on the development of the sexually dimorphic brain regions that function in sexual behavior.

Afferent Pathways↗

PubMed1998

Gonadal steroid-dependent GAL-IR cells within the medial preoptic nucleus (MPN) and the stimulatory effects of GAL within the MPN on sexual behaviors.

More GAL-I cells exist within sexually dimorphic cell groups of the medial preoptic nucleus (MPN) in male rate than females, a large percentage of estrogen-concentrating cells within MPN cell groups are also GAL-immunoreactive (GAL-IR), and significantly more GAL-IR cells are visible with estrogen or its precursor, testosterone. Gonadal steroids also increase the size (diameter) of MPN GAL-IR cells and the number of GAL-IR cell processes within a portion of the MPN called the "GAL-IR MPOA plexus," which exists in males only. GAL microinjected into the MPN stimulated male-typical sexual behaviors, with more testosterone required in females than males. Immunoneutralization with anti-GAL serum inhibited male-typical sexual behavior, indicating a role for endogenous GAL within the MPN. Microinjection of GAL into the MPN also stimulated female-typical sexual behaviors in estrogen-treated females and males, and GAL within the MPN dramatically overrode an inhibition of lordosis by dihydrotestosterone in rats of both sexes.

Animals↗

PubMed1978

Steroids and sexual behavior in castrated male rheusus monkeys.

Sexual behavior of long-term castrated rhesus males was not increased by administration of the hydroxylated metabolite of testosterone (T), 17 beta, 19-dihydroxy-5 alpha-androstan-3-one diacetate (19-OH-DHTA) at a dose of 1 mg/kg/day. Simultaneous administration of 19-OH-DHTA and estradiol benzoate (EB) also failed to increase the level of sexual performance, but daily injection (1 mg/kg/day) of testosterone propionate (TP) was very effective in effective in activating sexual behavior.

Animals↗

PubMed1997

Characteristics of 36 subjects reporting compulsive sexual behavior.

OBJECTIVE: The authors describe the sociodemographic features, phenomenology, and psychiatric comorbidity of 36 subjects reporting compulsive sexual behavior. METHOD: Twenty-eight men and eight women who responded to advertisements for "persons ... who have a problem with compulsive sexual behavior" completed structured and semistructured assessments, including the Diagnostic Interview Schedule for DSM-III-R disorders (axis I) and the Structured Interview for DSM-III-R Personality Disorders, Revised (axis II). RESULTS: The typical subject was a 27-year-old man who reported experiencing compulsive sexual behavior for nearly 9 years. Sexual behavior was described as excessive and poorly controlled and was associated with either subjective distress or impairment in interpersonal or occupational functioning or as overly time-consuming. Fourteen subjects (39%) reported a history of major depression or dysthymia, 15 (42%) a history of phobic disorder, and 23 (64%) a history of substance use disorder. Personality disorders were quite frequent, particularly the paranoid, histrionic, obsessive-compulsive, and passive-aggressive subtypes. The compulsive sexual behavior was quite varied and included both paraphilic (e.g., cross-dressing) and nonparaphilic (e.g., compulsive masturbation) types. CONCLUSIONS: Compulsive sexual behavior may be a clinically useful concept, but it describes a heterogeneous group of individuals with substantial psychiatric comorbidity and diverse behavioral problems.

Adolescent↗