Willcox R R
Br J Vener Dis. 1981 Feb;57(1):1-6. doi: 10.1136/sti.57.1.1.
About 2-2 1/2 million people do, or will repeatedly, participate in ano-rectal sexual intercourse in Britain alone. The anus and the rectum of these individuals are thus vulnerable to all the sexually transmitted diseases (except trichomoniasis). Male homosexuals appear to be more prone to these conditions than female heterosexuals, possibly because a large minority is indiscriminately promiscuous. Over the last 20 years homosexually acquired infections--particularly syphilis--have increased in Britain; these are now more readily admitted to because of changes in the law and in public opinion. The frequent changes of sexual partner among male homosexuals is the most notable epidemiological factor in the spread of venereal disease.
仅在英国,就有大约200万至250万人正在或将会反复进行肛交。这些人的肛门和直肠因此易感染所有性传播疾病(除滴虫病外)。男性同性恋者似乎比女性异性恋者更容易感染这些疾病,这可能是因为相当一部分男性同性恋者滥交。在过去20年里,英国因同性恋感染的疾病——尤其是梅毒——有所增加;由于法律和公众观念的变化,现在这类疾病更容易被确诊。男性同性恋者性伴侣频繁更换是性病传播中最显著的流行病学因素。