Legal drinking age

Slate has a cute vignette here from a book by professor Mark Regnerus of UT Austin:

A 19-year-old virgin walks into a bar. He's got his lucky cross in his pocket and his best jersey on. Please God, he says to himself, let this be the night. He spies a girl sitting at a table—blonde, wholesome-looking, just his type. He sidles up closer to the girl, who is chatting with some friends. Over the din, he can make out snippets of her conversation: at Bible study the other night … Pastor Ted says … saving it for marriage. Discouraged, he walks away in search of a more promising target.

I personally was under the impression that the legal drinking age in this country was 21 and that a 19-year-old has no business being in one, horny or otherwise. But I guess this just shows that conservatives are correct. Academia has been overrun by liberals who want to see this country dominated by lecherous alcoholics.