<human>: I attend a college with co-ed dorms. The shape of the buildings are roughly L-shaped, and the shorter end of the L is where all the girls live while the longer end is where all the guys live (the school's ratio of guys to girls is about 7:3, so it works out).

To get to my dorm from the front entrance of the building, you have to walk through the guy's end of the floor. Normally, this wouldn't be so bad except for the massive stench of vomit that exudes from the guys' bathroom. I assumed that some of my floormates go to parties, had too much, and would then leave the excess in the bathroom sinks, thereby causing the smell.

Or at least that's what I thought.

Turns out that the reason the smell is so bad is because of one guy: Ben. He's a bit of a social outcast but still hangs around some of the other groups of people on my floor. However, for whatever reason, he smells. A lot. Like bad BO that was stored in a jar to ferment for a week and then opened up and hung around his neck.

What's worse is that his roommate wears a lot of Axe and sprays it everywhere (I'm guessing to mask the smell). But instead of covering up Ben's horrid odor, it combines and forms an odor very similar to the smell of vomit.

Apparently for a solid month, the guys on my floor kept telling Ben to keep himself clean, but they gave up when they realized he wasn't listening or getting the point that *hey dude you smell bad and it's problematic for us to be around you.*

One of my friends was just considering to put a sign on his door that says *"Biohazard.....SERIOUSLY"* to try to get the point across, but honestly I feel like that might be too passively aggressive to do anything.

I personally have never talked to him, but the smell is incredibly noticeable to the point that something really does need to be done or else no one will want to be near him at all.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Floor mate smells atrocious. We've told him several times to take care of himself better, but he doesn't anyway. What do we do now?