Jon Hamm

I can imagine the sensation his frenulum feels rubbing against his boxers as he walks to his car.
Part of the reason he loves to walk around commando when he can - the feeling of his cock rubbing against the clothes. That and his casual exhibitionism of showing off his cock in public, just hidden by his trousers. His entire spiel of "Don't talk about my cock", "Don't look at my cock" was simply his way of using the Streisand effect to his advantage. Jon knows he's a big boy and loves it when he gets attention.