Well, just as a matter of interest - I work in a ladies consignment store (which is kind of thrifty!:))
We sell ladies underwear - they’re NEW. In addition to consigned clothing, we also clear for a number of botiques, so we get a lot of new stuff in.
I would assume that the undies in question were also new - generally, I think that Goodwill and whatnot sells underwear in “rag-bags” for dust cloths and things.
So, not only did you act like a jerk START, you acted like an IGNORANT jerk.
Had you been in my store, I would have kicked you and your friends out. YMMV.
Start, I asked about your meds for a reason. Some impulse disorders similar to what you have described are neurological in origin and you would have no way of knowing unless they are treated with the right medication. (And I’m not talking about Ritalin or anything that would make you feel like a zombie.)
I am not a physician, but God made some pretty good ones who have some insight into problems such as yours. If you have an interest in wanting to control behavior that hurts other people, you might want to explore that possibility.
I’m not going to assume that you are totally responsible for your own brain chemistry and the consequences. But you are responsible for continuing to try to find solutions to the problem. You can find more information about impulse control disorders and medications on the internet.