When the hell did American men lose faith in the reliability of their genitalia?

According to a new survey, more than HALF of single men in the U.S. say they've taken Viagra without having a prescription. That's right: More than half are taking black market Viagra. And 80% said that when they do take Viagra, they keep it a secret from the women they're having relations with. The team that led the study says, quote, "When sex is just sex and unrelated to a deeper emotional involvement, the situation becomes rife with competitiveness and performance anxiety. [Viagra] lessens that fear."