Why would guys in a voice chat insult me as trans?

Is that just a normal insult guys use? I have a girly voice, in fact I'm always told I have a "hot" voice or that I sound like a valley girl and have never once in my life been called that except in gaming. It's very insulting. I don't mind the kitchen jokes but wtf is this?

Why would guys in a voice chat insult me as trans?
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