DEAR AMY: Hey, kid. I have some intelligence for you regarding the important issue of VPL [touched off by a letter from a single father who was upset because his teenage daughter had taken to wearing thong underwear]. Men have spoken up volubly, and in statistically significant numbers, as have women. The subject of Visible Panty Lines is a recurring theme in my weekly online chat with readers nationwide. I have expressed my personal belief that men like VPL. This raises an intriguing paradox: The Panty Paradox. I put this to a specific test. In a poll accompanying my online...