Here are a few that I've encountered
In this one two guys fall asleep and accidentally end up ass to dick.
brothers
In this one the trainer tells his client to squat in his jockstrap and he (accidentally?) squats on to the trainer's finger.
https://mobile.gayforit.eu//119973.mp4?&
In this video Dante Colle is teaching Will Braun yoga and uses a magic power to make Will's shorts disappear so he can make Will put his bare butt on his dick.
Dante Colle & Will Braun
In this one two guys are camping and one is sleeping naked and his morning wood pokes on the others guys butt under the covers
Pitching The Tent
If I think of any more I've seen I'll repost.
Sorry I couldn't find better links for these videos. Probably a few of them are available with no pop ups on gayforit.eu I just didn't feel like searching too long.