I actually saw a page on Facebook that advocates making penis size a public matter just as breast size is for women. This of course is not so much an issue in a nudist colony but a problem in "polite" society. But even in a nudist colony I imagine guys walk around flaccid and that is no indicator of erect size. Bras of course are sized because breasts don't grow like cocks. I suppose they could imprint sizes about the flap on underwear. So a label may say: 8L5G? Of course we can depend on the honesty of the male of the species to not fudge about the size of his cock. Any suggestions how it could be done?