Why are college housing walls so thin...?

In college it seems like every wall built is about as thick as a sheet of paper. Earlier this week, i overheard some activities going on in my roommates bedroom that he probably wouldn’t want people overhearing. So the question is what do you as a fly on the wall do about it? So as a college student you have many options headphones are always a good thing. But my personal favorite is the blasting of loud and obnoxious music so that they are able to overhear it. College students if you want some alone time with a significant other and you are in the room please throw on a movie music for the greater good of your roommates.