God knows what his thinking was!
I actually quite liked sharing a room with someone because we became (and still are) very good friends. But for pretty much every other room it ended up being a car crash.
In my block they grouped each floor by gender. First floor was all men, the second and third were all women. The reason for males being on the first floor was because they would be better able to “deal with” people braking in, and you know what, there were a couple of times people did try to break in.
The upper floors had fewer double rooms so it was almost even in terms of gender. Problem is, that if there’s one thing 18 year old boys like to do, it’s masturbate. But there’s no privacy to do it because they were all in shared rooms. So a lot the boys on the first floor would ask to use the communal shower cubicles on the 2nd and 3rd floors, and say that the 1st floor shower was occupied. The boys then proceeded to masturbate in those showers, often hiding porn mags within their towels as they walked in. Those showers were almost in constant use. They promised to never masturbate on the bottom floor, but once I walked in and a lad had forgotten to lock it. Horrific.