I'm bothered by things that I can't comprehend as a whole -- at least after I've tried and failed to grasp them.
It's like that with electricity and electrical devices for me. I just don't understand how electricity works. There seem to be too many properties at work or something.
I just take their word for it that it's best to connect the ridged wires to the silver screw and the smooth wires to the brass screws -- but I don't like it.
The house graveyard of dysfunctional lamps was growing, and so I had to take up my wire strippers and needle-nose pliers and start swapping parts around to get a few going again. And when I plugged it all in nothing caught fire, though I couldn't tell you why not.