I don't think anyone really associate the the "rest" in "restroom" with resting. May as well call it infantile to call it a "bathroom" when only children take baths.
Right, I resist calling it a bathroom in places where it won't actually have a bath. Guess I should start asking at restaurants where the water closet is?
Huh?
I regularly take baths. They are very relaxing and help me de-stress. They are also good for relieving some types of pain.