Sometimes people just like to invent stuff that are not too necessary. For example shower chairs. I find nothing special on it and could easily be replaced with any other chairs or stools at home.  

HW: "Hobbit, which shower chairs would you prefer?"

HH: thinks...

HH: "Nah...this one looks exactly like the stool in our room."

HW: "This one?"

HH: "A mounted shower seat??? Cool!"

HW: "How 'bout this one?"

HH: "Excuse me...I don't see anything special with it..."

HW: "Well, what about this one?"

HH: "What's that odd curved for?"

HW: "It's a hygienic bath bench with back! Okay, okay...soothe yourself because like it or not, this baby chair is most likely for you!"

HH: "A bathtub seat! Now you could sit on it while we play saloon!"