Ray Stantz has been on a ghostbusting job for the last six hours, hunting down a few ghosts at a local grocery store. His friends had split up, leaving Ray on his own. Walking down an aisle, Ray has the strong urge to take a shit. It had been almost a week since Ray had a bowel movement and he thought holding it longer would just be bad for his body. He looks around before leaning against a shelf and pushes. He ends up having a really big dump in his boxer briefs. He gets aroused, as he feels the poop spreads all over his butt and ball sack. He then sat on the floor, letting the crap leak out the back of his underpants and warm shit covering his dick.
Egon sees him and approaches him. First thing he notices, is the smell.
Egon: Did you just have an accident?
Ray: It was on purpose.
Egon didn't say anything, but just gave a funny look. Then Peter and Winston approach him. He tells them the same thing he told Egon.
Ray: I pooped my pants on purpose, okay. Don't judge me.
Winston: Let's get you back to the firehouse, so you can get cleaned up.
Peter: Yeah, no kidding.
Ray let his friends help him up and go back to the car. Even after he cleaned up, Ray thinks of the moment and enjoyed having his whole backside and crotch covered in masses of shit.