I don't know what to say..... I was all out shopping with a bunch of CD girls a couple months ago and a store clerk kept referring to us as "you guys" and I didn't like it.
If I were in your shoes my first response is, "yes you can help me you son of a bitch and what rock did you just crawl out from under?" In saying all of that it might not be the right thing to do. Simply walking up and saying that I am not a SIR anymore would be more appropriate.
Yes, being TS sucks, I can't imagine.