I once had a lightswitch. What it lit, I don't know. Still don't know. Well, I know but I just don't understand. I turned it on and off, seeing which room it lit up. I must have flicked it on and off a million times. I finally gave up. But I would occasionally go by and flick it on and off just for the hell of it. Then one day I got a call from an irate wonam in Germany who told me to stop turning her damn lights on and off.