Sexuality.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D003075:Coitus; D005260:Female; D006801:Humans; D008149:Love; D008297:Male; D008875:Middle Aged; D009769:Object Attachment; D012723:Sex; D012727:Sex Characteristics; D012725:Sexual Behavior