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The risk of HIV transmission from a single act of condomless anal sex
Receptive anal intercourse is an established risk factor for anal cancer primarily because it increases exposure of the anal mucosa to oncogenic human papillomavirus (HPV), and multiple epidemiologic ...
(RAI) in women carries documented physical and infectious risks—most notably a higher per‑act risk of and increased vulnerability to because rectal tissue is fragile and prone to microtears . Evidence...
carries well-documented health risks—primarily transmission of and, in the case of vaginal exposure, potential effects on vaginal microbiota—while pregnancy from oral ejaculation is effectively imposs...
Fellatio (oral stimulation of the penis) carries relatively higher, well-documented risk for bacterial infections of the throat—especially and chlamydia—and is the oral practice most often linked to p...
Anal sex carries specific injury and infection risks because the anus does not self-lubricate and the rectal mucosa is thin and prone to tearing; practical prevention steps—ample lubricant, slow/relax...
Proper pre-sex preparation that reduces the risk of anal tears and infections centers on lubrication, barrier use, gentle technique and communication, and thoughtful hygiene; combined, these measures ...
Receptive anal exposure carries higher per-act transmission risk for many sexually transmitted infections, including HIV, because the rectal mucosa is biologically more fragile and prone to microtears...
Meeting someone on a hookup app and having them accept internal ejaculation the very first time is neither vanishingly rare nor the modal outcome; surveys of hookup and first-sex behavior show condoms...
Consistent use of oral or injectable PrEP cuts the per-act risk of acquiring HIV from receptive anal sex from roughly 138 infections per 10,000 exposures (about 1.38% per act) to on the order of 1 per...
Per-act estimates used by major public-health bodies place the risk of HIV transmission from a single act of condomless anal sex at roughly 1.38% (138 per 10,000) for the receptive partner and about 0...