Weird Japanese
I was at Mitsuwa with Scooter & Fluffy this weekend. What a shock when I walked into the bathroom. It's totally remodeled with automatic everything.

In each stall, on the wall partition, there's a little box that looks like a radio or intercom. I can't imagine that many people need to call for help when they're in the bathroom. Anyway, I put my hand in front of what looked like a sensor, and there was the loud sound of a toilet flushing! So I have two theories. (1) The sound of rushing water is to encourage anyone with a shy bladder. (2) It drowns out the sound of you going pfffftttttt!