Boxer briefs in a variety of colours. I can't stand regular boxers because the fit tends to be baggy and I hate them bunching up under clothes. Also, you know, boxer briefs show off the manhood quite nicely.

As for socks. Don't wear them, and don't trust them. Something about how they always come in pairs makes me think they're plotting something. You know when you take your clothes out of the dryer and only find one of your socks there? The other one hasn't gone missing, it's pretending you're Robert Muldoon and coming at you from the side. They're worse than smurfing Raptors.