True story: My first-grade classroom had a bathroom setup similar to this one. I distinctly remember it because one day during storytime, I had to pee REALLY bad, but my teacher wouldn't let me go to the bathroom IN THE CLASSROOM during the story. So she made me sit on the tile (everyone else was on the carpet) so I wouldn't have an accident on the carpet.
Who'd've thought that'd become a formative memory for me?