"pee" and "poop" are like the base terms for those two things. With "piss" and "shit" being the crude terms, and "poo" or "wee" being the more childish terms. This is the most stupid conversation I've ever had on this website.
Hearing parents using terms like "willie" or "pee pee" with toddlers in place of "penis" strikes me as really odd and awkward.
Restroom is one of those writing-only words, in my experience.
Huh?
I regularly take baths. They are very relaxing and help me de-stress. They are also good for relieving some types of pain.