So, read this link first:
If you're a male transvestite hoping to score some gay fellatio, you'll probably want to make sure the hetero fellator knows you're not a woman.
To paraphrase Jasper Beardley, " Asking a straight guy to go down on you when he thinks you're a woman.....that's a stabbin'."
Doesn't this remind you of Tone Loc's "Funky Cold Medina" lyrics?
Life lesson learned here:
If a woman picks you up hitchhiking, and asks you for oral sex, it's a man. 100% of the time.
These are men