I've never understood why wearing underwear under board shorts, it doesn't matter if it's a thong, boxer briefs, etc... There is a net inside!! I use to wear boxer briefs as swimwear, but when I wear board shorts I never wear underwear.I love that last one! But it makes me raise the question. Why even wear the shorts? People are so interesting to me. I would have just left the shorts at home! I mean that dude is huge! You would have to be a really stupid person to criticize a body builder type guy like that for wearing a thong.