If you have to pee immediately before shaking someone’s hand, is it better to wash one’s hands—resulting in a handshake that’s likely cold and a little damp no matter how well you towel off—or is it better to skip the handwashing figuring a firm, confident, non-clammy handshake is important and what they don’t know can’t hurt ‘em?
Go with option 2. It will give you a psychological edge.