It is polite to maintain good personal hygiene
James has a heavy course load and is very stressed studying for finals.
James wants to use all his available time studying.
James listens to his professors' recorded lectures while he showers.
James stops showering, so he'll have more time available to study.
James is both well prepared for his finals and hygienic enough to be socially acceptable.
James' roommate eventually drag him into the shower to eliminate the stench.