I don't have much to add. I don't mind wading through masturbatory images if they're done with some artistic quality -- even if it's just a solid understanding of artistic anatomy.
I have used images from actual porn for anatomy studies. You just don't see those poses anywhere else.

In the mean time- I will say it is extra-extra funny coming across rule 34 art of a cartoon I have worked on. Detentionare has some pretty hilarious stuff out there, so does Wild Kratts.
oh internet- you slay me.