From the source:

A commission Dog-bone did for me at BLFC 2014! If I recall, I told her something along the lines of "draw Sulfer with a gaping ass, like he just took a huge horsecock." No shame! The results are just fantastic.

This was too big for my scanner. The photocopy is not the best, but I think you can still enjoy it anyway. X3

Art is by Dog-bone ( https://inkbunny.net/DogBoneArtWork )

Sulfer © Me