Sex and marriage.
D000293:Adolescent; D000328:Adult; D000368:Aged; D003075:Coitus; D003376:Counseling; D005260:Female; D006801:Humans; D008297:Male; D008393:Marriage; D008875:Middle Aged; D010817:Physician-Patient Relations; D012736:Sex Education; D012725:Sexual Behavior