title: Speculations on innovations to conventional marriage in old age.
mesh_terms: D000368:Aged; D005190:Family; D005260:Female; D006716:Homosexuality; D006801:Humans; D007398:Interpersonal Relations; D008019:Life Style; D008297:Male; D008393:Marriage; D010379:Peer Group; D012723:Sex; D012931:Social Environment