Well, it's not erotic for those of us who are not voyeurs. It just looks like men accidentally exposing their not-ready-for-action cocks when they have other things on their minds than sex.
In other words, it's just blokes.
creepy to take advantage of unconsenting dudes like that. very not cool and pervy.
There are some funny pictures in that site.
That's precisely why it's so hot, R1.
boys will be boys
Penile peeping was my main focus/hobby when I was a pubescent kid in the '70s. The athletic shorts and cutoffs were so short back then that you could see awesome bulges and popouts almost daily in the summer (all with natural bush). Loved working the rowboat rental at the lake - excellent peep action as the hot party guys got in and out of the boats, just unreal.
The girls were hot as fuck then too, by the way. Not the made up tatted up nasty porn-star wannabes they are today. Just hot as fuck and natural and FUN.