Perfect condom use in a less than perfect world.
Adam
Mary B
MB
D017280:Condoms / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D040242:Risk Reduction Behavior; D012725:Sexual Behavior / Q000523:psychology; D012749:Sexually Transmitted Diseases / Q000517:prevention & control*