Drugs and sex: scene of ambivalence.
D003075:Coitus; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D009657:North Carolina; D012494:Sampling Studies; D012725:Sexual Behavior; D012959:Socioeconomic Factors; D013334:Students; D019966:Substance-Related Disorders; D011795:Surveys and Questionnaires; D014495:Universities