I had the pleasure the other day of walking down a busy street and seeing an elegant woman (wait for it) floss her teeth with one of those flosser thingymajigs you can buy at the drugstore. Ummm, really, lady? Grody. It made me wonder, what could be grosser? And then I remembered the spine-tingling sound of someone clipping his nails on public transportation. So what will it be . . . what's tackier?