Unfortunately, My bride and I are of the age where knowing the location of the public "restrooms" is an absolute necessity. It's just like the Rolling Stones sang, "What a drag it is getting old".
Oh man, I have the smallest bladder in the world so that goes for me as well. It's really comforting to know that I don't have to control how much I drink for the fear that I won't find a bathroom. It can be such a pain in the butt in Berlin!
And they have sprinklers to wash your butt, right? Is it like the Simpson's episode, the toilet gives you tourism tips?
YESSSSS (I mean not the tourism tips)! The butt sprinklers (Washlets) are the best. They don't give you sightseeing tips but they do play sounds of the water running to cover up the noise as you poop. I think they started installing that to conserve water because a lot of people would needlessly flush the water in order to cover up their noise. Oh, Japan.