Your average guy maybe, but I doubt you'll get too many women or teenage girls to shower inside of 5 minutes, especially if they have long hair. However a shower longer than 10 minutes might as well be a bath as your average tub only needs 60 gals to fill and your average shower pumps out 50 gals in 10 minutes. So if you take your time showering, you might as well take even longer and have a good bath instead.
After all a shower is supposed to be a fast alternative to a bath, if you take forever in a shower you might as well go full hog.
Baths don't seem to make much sense: you're soaking in the very filth you're trying to clean off of yourself, and after you're done, you're still soapy so you need to rinse off anyway. It also takes time to draw the bath, time that you would otherwise be washing yourself.
When I was young though, I would close the drain, shower, and then take a bath once the bathtub was full.
