The perils of promiscuity.
D003075:Coitus; D005260:Female; D005831:Genital Diseases, Female / Q000209:etiology*; D005832:Genital Diseases, Male / Q000209:etiology*; D006716:Homosexuality; D006801:Humans; D008297:Male; D012306:Risk; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000209:etiology*