Huh?
I regularly take baths. They are very relaxing and help me de-stress. They are also good for relieving some types of pain.
Restroom is one of those writing-only words, in my experience.
Hearing parents using terms like "willie" or "pee pee" with toddlers in place of "penis" strikes me as really odd and awkward.
The words they use after they break this nigh-impenetrable barrier are usually codified in the most non-offensive ways possible. Someone having a conversation about "shit", for instance, will have a far more uncomfortable audience in North America than someone passively mentioning the existence of "poo" to a group of people. Often, the very subject's focus in a conversation will make listeners question the mental health of the speaker (seriously).
TL;DR - The culture around bodily functions is way crazier than what we call them.
Unless it's a group of women talking about menstruation, that can go on for hours.
Fortunately with travel sites like Tripadvisor often include photos from your average tourists who didn't get the memo about "never take a photo of the bathrooms ever!" and thus you get to see what you're in for with the accommodation. There's no alternative with home shopping, other than physically visiting the place.