Serious question for drivers, Boxers? Briefs? On preload I'm set on wearing compression shorts (AKA spandex bike shorts) under my shorts. they are nice cause they don't move around etc.. I plan on wearing them still while driving. only problem is with shorts, they show while sitting, trying to find shorter ones has been tough. well anyway, I was curious and thought I'd ask. And while I'm at it, undershirts? opinions.