Effects of sexual congress.
D000163:Acquired Immunodeficiency Syndrome / Q000209:etiology / Q000276:immunology; D005260:Female; D006716:Homosexuality; D006801:Humans; D008297:Male; D012007:Rectum / Q000276:immunology; D012661:Semen / Q000276:immunology; D014621:Vagina / Q000276:immunology