"Slippage." That was by far my favorite word in the letter Andover's West Middle School Principal Denise Holmes e-mailed to parents regarding their children's attire, or lack thereof, at school. Her note was prompted by the outfits a group of girls was wearing on Valentine's Day, with skirts so short that ... well, let Ms. Holmes explain. "This one girl had the cutest pink underwear on," she said. "I shouldn't have known that." Well, no. But she's not the problem. The problem is that all the boys knew it as well. So Holmes sent out a gentle reminder. Very gentle....