Not a guy, but first I would not worry so much about
what people think. I have learned the hard way that most people's minds are only really on themselves. Why not just get a long shirt and maybe swim with that on along with your shorts. Wear the Hy Tape swim tape or other swim tape to frame the flange and have a good swim or get one of these rashie things. Not familiar with that. Have fun. Life can be short. I know, easier said than done, but......
Good luck. YOu are lucky to live so close to a beach
Sincerely, Rosemary