According to the architects of America's stupid, wasteful, moronic, freedom-restricting, 6th-Amendment trashing (OK, get on with it - editor) War On (Some) Drugs, certain drugs are "gateway drugs" - meaning, presumably, that you, say, smoke a doob, get bored with the buzz (and ensuing munchies, or so I'm told) and bingo! next day you run out and shoot up with angel dust or snort some heroin or put cocaine in your ears or whatever.

Well, anyway, apparently this "gateway" effect is not limited to illegal & fun drugs. Looks like it may have happened with Viagra. Thanks to Chris for reporting this one.