PubMed · 1353141
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1992-07-25. Multipurpose spermicides.. https://pubmed.ncbi.nlm.nih.gov/1353141/
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A new type of imperfection in condom latex, present during moderate stretching, was observed by low magnification scanning electron microscopy. The normally smooth surface of relaxed natural latex was transformed into an accordion-like arrangement of ripples in addition to tears. A corollary experiment with Alcian blue dye placed into both stretched and unstretched condoms leaked no dye. These surface features are consistent with latex acting as a molecular barrier. The tears may represent areas of lowered mechanical resistance and raise questions concerning quality control.
Much the most common models of HIV-related risk behaviour are those psychosocial models derived from studies of health behaviour and tested on large interview samples of American gay men. These models were not appropriate for understanding risk behaviour among 32 Glasgow male prostitutes. Whereas psycho-social models conceive of risk behaviour as volitional and individualistic, ethnographic data indicate that the male prostitutes' risk practices were constrained and emergent from the immediate circumstances of the sexual encounter. Unsafe sex was associated with client control. Safer sex was associated with countervailing prostitute strategies of influence. These data confirm the utility of self-empowerment approaches to health education.