Sex in the aged.
D000368:Aged; D003075:Coitus; D004700:Endocrine System Diseases / Q000150:complications; D004777:Environment; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D008418:Masturbation; D008659:Metabolic Diseases / Q000150:complications; D008875:Middle Aged; D009790:Occupations; D012725:Sexual Behavior; D012959:Socioeconomic Factors