I have dirty drawings as well, I dont know if I want the internet into that part of my brain. I think every artist has a selection of works that they dont really want seen. But I actually have posted a bunch of things that I would not of a few years back just because fuck it, why not. But my dog does alot of art just wacked right out on entheogens, and some of them are almost downright incriminating hahaha.
There's something to be said for class, but I think it's also true that all that is dirty is an inextricable part of the human experience (or maybe the entire animal kingdom experience), so who can fault you as long as you aren't breaking the sacred rules?