This one didn't actually happen to me, but to a coworker, who immediately called and relayed it to me:
Customer: I'm looking for a kids' book. Nothing too simple. Something for a kid about twelve or thirteen.
Stephen: Well, there's a newish series of books out called Diary of A Wimpy Kid. It's a memoir with illustrations about a kid who...
Customer: It's not a Gay Comic is it?
Stephen: Uhhhh. No.
Customer: Because I don't want to start him on the gay stuff too early.
WHAT DOES THAT EVEN MEAN???