I'm so crabby...

I went to sears and bought a steering wheel puller/harmonic balancer puller and the older guy(maybe in his 50's or 60's) who rung up my purchase gave me a look and said "you're pulling a harmonic balancer!?" I said, "no, a steering wheel" then asked what kind of car, and I said "a Cadillac." Then he asked me if I knew how to get the nut off, and I just said "yes" even though the answer is really not specifically, because I was tired and I didn't want to listen to an explanation (that I wasn't going to remember any of) about how to do the whole procedure right there in the store with a line of people waiting behind me. I felt bad, because to that he said "oh, I didn't know you were such a consummate mechanic." then he tried to talk me out of buying the tool "ya know you don't really need a specialty tool to pull the steering wheel..." To which I said, "yes, but it makes it easier." afterwards I felt bad because people really like to feel like they can pass on their knowledge to others, but I also didn't, because he was a little chauvinistic.