I was at my girlfriend's apartment recently, when she complained that her toilet seemed to be running.
I told her to wait a second, but she seemed convinced it was some kind of problem.
I tore myself away from whatever I was doing and walked over the the bathroom, where I cleared off all the stuff that sits on the toilet and opened the tank.
Everything looked normal, so I took the opportunity to go through all the parts and how they worked together to make a functioning toilet. The chain, the flapper, the float, the whole darn thing.
Much like this photo.
I thought it was interesting, and figured my girlfriend would appreciate knowing how it worked so she could fix it in a pinch.
She looked at me like I was some kind of crazy person.
I guess that will still be my job.