Homosexuality, sexual dysfunction, and incest in male identical twins.
D000328:Adult; D001143:Arousal; D004200:Diseases in Twins; D007172:Erectile Dysfunction / Q000235:genetics*; D005260:Female; D006716:Homosexuality; D006801:Humans; D007179:Incest; D007207:Individuation; D008297:Male; D010043:Outcome and Process Assessment, Health Care; D011247:Pregnancy; D011613:Psychotherapy; D014430:Twins, Monozygotic