You don't have to go through the rigours of getting a brazilian wax :o] so you can wear the hottest swim trunks or deny you crotch sans thighs some fresh air by wearing knee length board/swim shorts. Opt for Mid length shorts that give your main area some air and still look chic.
For men with athletic physiques which include huge thighs[which could be a concern] , it gives the illusion of slimmer thighs.
Shorts featured are Asosman.