Since we're on the subject, those of you who wear a type of compression short (Under Armour or something like that) under your trunks, do you have problems with sand getting up in the compression shorts and not being able to get it out? I was wearing under armour underneath my trunks but it seemed inevitable that sand would find its way in and no way to flush it out. If you're wearing boxers or free ballin sand will come up but just flush right back out.
those neoprene shorts rot your junk in summer because they never dry out. go with spandex for chaffing. I really like those oneill surf boxers.
I really dont like anything under board shorts or wetsuits- But I had used oneil polypro shorts for a few years under an old wintersuit (when I couldnt get a new suit)- since the suit was old and leaked It help keep warm. But its a pain getting the suit on and keeping the shorts from riding up... i have seen cheap neoprene shorts at target in the workout/weights/equipment section... kinda gay, but might be worth to try for 10 bucks compared to 65...
As far as chaffing in the summer- go with the boxers or just deal with it... and get some diaper rash cream! haha
Hahahaha! Hey... after a few hours paddling around, it starts to feel like when you sleep on your arm wrong anyway.