Sexuality and aging.
D000368:Aged / Q000523:psychology*; D000375:Aging; D003376:Counseling; D003625:Data Collection; D007172:Erectile Dysfunction / Q000209:etiology / Q000523:psychology; D005114:Extramarital Relations; D005260:Female; D006716:Homosexuality; D006801:Humans; D008297:Male; D008418:Masturbation; D010410:Penile Erection; D011606:Psychosexual Development; D012725:Sexual Behavior