clipped from: scienceblogs.com   
have you heard the one about the country boy who goes to Harvard? A bit lost, he stops a student and asks, "Excuse me, where's the library at?" Snottily, the student admonishes, "Here at Harvard, we don't end a sentence with a preposition." So the country boy says, "Gee, I'm sorry. Where's the library at, asshole?"