MSM have high partners, regardless of HIV‑status (20), while in other studies transmission rates in other parts of the world (6), and recent MSM in primary relationships had more UAI with casual partners increases in the number of new infections have been observed in in the past three months (21). [...] In contrast, other studies, including an Use of alcohol and club drugs, particularly methamphetamine Internet study, identified only a small number of men genuinely and poppers, and attending bathhouses, sex clubs, and circuit seeking partners of discordant serostatus: 1% of HIV‑positive parties are associated with risky sex (36–39). [...] Thus, among MSM, selecting a partner with unknown serostatus would increase the relative risk of HIV acquisition by 43‑fold Other factors such as the presence of sexually transmitted compared to serosorting and choosing a partner who tested infections and high viral load may also increase the risk of negative. [...] A study of HIV‑positive gay and bisexual men found that 49% reported having at least one In the U. K., between 1997 and 1999, the number of requests anonymous partner during the previous four months, and 71% for nPEP increased four‑fold and the number of prescriptions did not disclose their HIV status (58). [...] Sex and outside the relationship: a description of behaviour of men who have sex with men HIV‑positive MSM in primary relationships.