Love is multiple things and is still meaningful for us.
Theoretically I can see somebody not being attracted to guys, as in masculine people, or just males, but still being turned on by penises as we see in OP's example. That person might not call themselves gay since they wouldn't want to be in a relationship with any guys, but might be interested in a hookup with a trans woman who still had their dick.
Maybe their is some nuance in what being gay is or there is room for another descriptor for this phenomenon.
Edit: reading below, this person might be hetero-romantic and homo-sexual.