What makes this gay?

Questionable? That's a seriously questionable rating. *badum tsss*

Seriously. How is this questionable? It's not like there is no genitalia in this picture.
And if you want to dicuss about it: There is a small gap between the uderwear and the leg. The black thing is the penis. So it's rated explicit anyways.

I'd bend over for him in a heartbeat.