Most of the beaches I've been too lately, except the nude beach in Toronto, seem to be frequented by younger guys wearing swim shorts so long they look like culottes. I never understood why guys wear such long shorts these days. Not just swim shorts either. Street shorts that hang down below the knees. Just wear jeans instead, I say. I seldom see guys with little bathing suits on that show any penis outline. You'd not even know the dude had a penis when it's buried under such big and baggy shorts.
Older people may not be as aesthetically pleasing to the eye perhaps. But I've found they tend to be friendly. Whenever I read posts by young guys who are so critical of older guys they see in the locker room or at the beach I'd like to remind them that all too soon they will wake up one day and realize they are an old guy themselves. I speak from experience....
As for people who bring little kids to the beach and might object to seeing a penis outline. Stay home, or leave the kids at home if it is a problem for you. Good thing they don't go to beaches in Europe where most women are topless or some people are completely naked. We have such prudish views in our country for some reason regarding the human body and nakedness.