I don't know how I should feel about this. First when I was in the closet, I tried going out with girls and kissing them was like kissing death flesh. I felt nothing at all
I definitely NEVER had feeling or sexual attraction for a girl in real life. But, that doesn't mean that I can't find some girls VERY hot

But, I would never kiss them or have sex with them.
As for the straight **** you mentionned, it can excite me a lot too. Sometimes, more than gay ****. But, I don't think it's because of the girls. If the guy is ugly in this type of ****, I just switch and I have 0 excitation on lesbian ****.
So that's why I consider myself 99,9% gay. I am only attracted to men, I only have sex with men, I can only have feelings for men ...