The telltale wet spot on your underwear tells you that some of your dorm mates loads have leaked out of your formerly tight hole.  The walk of shame thru the dorm back to your room, three floors away, is going to be that much more embarrassing with your recent conversion to cum dump very visible on your ass.

The worst part is that you can’t remember who took part in the train you pulled last night, so you have no idea if the guys you pass in the hall have contributed a load of two to the wet spot.