Is it normal that i like gay porn, but am attracted to women

I like gay porn, I watch it every time i masturbate. But I am only attracted to women, I don't really think that I am gay, but contemplate that I'm just subconsciously convincing myself like that. I intend to live a life where I marry/be with a wife and have kids, would this be bad since i think that i might be gay? I've heard from friends who are gay that if you are, you would know, and you would be absolutely sure.

P.S. I usually only like the porn with men that have big muscles. But I never get boners from a man like in public, where as I constantly do with attractive girls.

P.P.S. I don't find straight porn attractive at all, vagina's just look really strange when they get penetrated. The only straight porn I've ever liked with actual fucking is the kind like in movies (softcore) where you can't actually see their vagina.