Eh?
I am a proponent of wearing undies to work. I think it might just be a little more professional than having your junk flopping about very visibly all over the place, and to ensure that you don't wet-spot after a pee or anything else. Who really wants a yellow piss mark on the front of a pair of nice, ice-white Quiks?
This is however not necessary down at the beach, IMO. In addition, having wet undies which don't quick dry under fabric which does, means the quick dry fabric doesn't dry and repeatedly gets wet from the stuff underneath it.
Oh, and it looks fucking stupid, too. And it comes off as being precious, and I simply don't have time for anyone who is that high maintenance.
-d-