I also taught myself how to blow glass using a propane torch from the hardware store and managed to make some elementary chemistry plumbing such as tees and small glass bulbs.
I never play a villain that I don't have something I can either do or say so the audience sees there is something redeemable about them. In other words, I don't want to do evil for evil's sake. I don't want to do Jason slasher movies. There's no point in that.
I suddenly had this really mad desire to have an affair with a woman. I was divorced. I was childless. I figured there's got to be one more way to really tick off my mom.