Inspiration...

This morning, in bed with one of my more-or-less regular fuckbuddies, we were making up dirty stories. While he stroked my cock and fingered my ass, we came up with this fantasy of a boy sitting on a man's shoulders, the man pulling the boy's ass wide open with four fingers, and a third guy aiming to enter. So after I got up I threw out this sketch, which I hope I'll manage to turn into a complete drawing one of these days...