His internal monologue is full of vulgar jokes and bad puns. He just is gentlemenly enough to keep it to himself, be posh, and respectful. 

As for the bed situation, I also assumed out dorm set up was more like Team JNPR than RWBY. Regardless there are only three beds since Gren replaced his for his rig and workbench. Compensation for bringing his big computer into their door and taking up floor space.