While rummaging through Slate, I came across this:
http://slate.msn.com/id/2123007/
So there doesn't seem to be any major harm in letting it all hang out. For myself, after alternating between compression shorts and boxers for aikido practice, I find I much prefer boxers now, especially silk ones. Yeah, thought about going commando, but silk feels so much better against the rear end compared to thick polyester or cotton...
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