Men who have sex with men
First, it was pursued by epidemiologists seeking behavioral categories that would offer better analytical concepts for the study of disease-risk than identity-based categories (such as "gay", "bisexual", or "straight"), because a man who self-identifies as straight may nonetheless be sexually active with other men; similarly, a man who self-identifies as gay or bisexual is not necessarily sexually active with other men.Men who are non-heterosexual or questioning may identify with all, none, a combination of these, or one of the newer terms indicating a similar sexual, romantic, and cultural identity like bi-curious.[6] There were no similar traits in all of the MSM population studied, other than them being males and engaging in sex with other men.[7][8] The term's precise use and definition has varied with regard to transgender and intersex people, who do not fall neatly into binary sex categories.[10] In the U.S., among men aged 15 to 44, an estimated 6% have engaged in oral or anal sex with another man at some point in their lives, and about 2.9% have had at least one male sexual partner in the previous 12 months.[38] Studies have found that less than 5% of MSM in Africa, Asia, and Latin America have access to HIV-related health care.[38] Pre-exposure prophylaxis (PrEP) is the use of medication to prevent HIV transmission in people who have not yet been exposed to the virus.[39] As of 2018[update], numerous countries have approved the use of PrEP for HIV/AIDS prevention, including the United States, South Korea,[40] France, Norway,[41] Australia,[42] Israel,[43] Canada,[43] Kenya, South Africa, Peru, Thailand, the European Union[44][45] and Taiwan.[51][52] Genital human papillomavirus (HPV) is a common virus that most sexually active people in the U.S. will have at some time in their lives.[53][55][56] Though not commonly classified as an STI, giardiasis can be transmitted between gay men,[57] and it can be responsible for severe weight loss and death for individuals who have compromised immune systems, especially HIV.[61] Most national standards require direct questioning regarding a donor's sexual history, but the length of deferral varies.
Men who have sex with men may donate blood without a deferral
Men who have sex with men may not donate blood within the deferral period
Men who have sex with men may not donate blood; permanent deferral
Unknown
Female sex partners of men who have sex with men may donate blood without a deferral
Female sex partners of men who have sex with men may not donate blood within the deferral period
Female sex partners of men who have sex with men may not donate blood; permanent deferral
Unknown
sexual activitysexual orientationsexual identityepidemiologistssexually transmitted infectionsHIV/AIDSbisexualpansexualmale prostitutessocial researchlegal adultspublic healthinitialismsocial constructionThe Huffington PostCleo Managosame gender lovingnon-heterosexualquestioningbi-curioustransgenderintersexSexual practices between menanal sexoral sexfrottingmutual masturbationNATSALThe BMJConvenience sampleHealthcare and the LGBTQ communitySexually transmitted infectionanal sex without use of a condomurethraHIV and men who have sex with menAcquired immune deficiency syndromeimmune systemhuman immunodeficiency virusdeveloped countriesAIDS fatiguecondom fatiguesafer sexPre-exposure prophylaxis for HIV preventionPre-exposure prophylaxisUnited StatesSouth KoreaFranceNorwayAustraliaIsraelCanadaSouth AfricaThailandEuropean UnionTaiwanNew Zealandhepatitis Bhepatitis Aworld's populationhepatitis B virusTreponema pallidumGenital human papillomavirusimmune systemsgiardiasisCenters for Disease Controldepressionanxiety disordersBlood donation restrictions on men who have sex with mencorneasBlood donation policies for men who have sex with menBlood donation policies for female sex partners of men who have sex with menPrison sexualitySexual diversityTerminology of homosexualityWomen who have sex with womenSystematic ReviewsSpringer NatureUNAIDSWayback MachineMcGraw-Hill InternationalToby JohnsonLethe PressHarrington Park PressCenters for Disease Control and PreventionCengage LearningBibcodeEuropean Medicines AgencyMedical Journal of AustraliaUNESCOOutlinehuman sexualityPhysiologybiologyClitoral erectionErogenous zonesInseminationLibidoNocturnal emissionOrgasmFemalemale ejaculationPelvic thrustPenile erectionPre-ejaculatePregnancySexual arousalSexual response cycleSexual stimulationVaginal lubricationHealtheducationBirth controlCondomMale contraceptiveMasters and JohnsonObesity and sexualityReproductive medicineAndrologyGynaecologyUrologySafe sexSex educationSex therapyPLISSIT modelSexologySexual dysfunction