Yebbut if you wear knickers under your trousers you keep the undercarriage of the latter much cleaner for much longer. I'd far sooner stick a pair of dodgy-gussetted boxers a day in the laundry basket than a pair of trousers a day, which I'd probably have to do if I went commando (and no, there's nothing wrong with me, I'm simply one of those rare beasts, a man requiring freshness and hygiene of the "Biffin's bridge" department). I think we all know what we're talking about here. Understains, innit (remember the Daz adverts of the 70s, lads?)