I'm not sure if OP means why do people prefer a bath to a shower or why do they not want to wash at all. However depressed I am, I always, always wash. I can't bear being personally dirty. I take a bath every morning and a bath every night without fail. When I'm depressed the house suffers big time though. I just stop cleaning, stop washing clothes, don't even bother to clean out the hamster, poor little sod. It's just personal cleanliness that I can maintain.

Darvula