Sex tied to drugs = STD spread.
Goldsmith
M F
MF
D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control; D000293:Adolescent; D003042:Cocaine; D005260:Female; D006801:Humans; D008297:Male; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000517:prevention & control / Q000635:transmission*; D019966:Substance-Related Disorders / Q000150:complications*; D014481:United States
D003042:Cocaine