Let's assume you are dating a girl, you really like this girl and she's pretty (at least to you). After several dates she decides to get sexual.
You go back to your place, she's getting naked, you're getting naked. And suddenly you realize, she has both a penis and a vagina (of sorts). While this is pretty rare (even for an intersex person) it is not totally unheard of.
Assuming you didn't pass out, or run out of the room screaming like a little boy, do you think you would consider it gay to suck her cock (the intersexed girl that you like, and who was born this way biologically)?