On living together without marriage.
D001290:Attitude; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008393:Marriage; D010290:Parents; D010379:Peer Group; D012071:Religion and Sex; D012111:Residence Characteristics; D012725:Sexual Behavior; D012923:Social Class; D013334:Students; D011795:Surveys and Questionnaires; D014495:Universities