Is it normal to be attracted to only white women?

I am attracted to only white women. But here is the strangest part - I am not white myself.

I used to be attracted to women of my own race and other races. But slowly as time progresses I find myself more attracted to white women than women of other races. At first I didn't even notice but I realized that all the pornographic material I had, all of them were exclusively of white women. So I started thinking about my dating life and realized that previously although I didn't care about their race, now subconsciously I was trying to date more white women than others. Sometimes I even rejected advances of other women. I used to tell myself something like "right now I am too busy to date" etc. But when I consciously thought about it, I realized had it been a white woman, I might have said "yes".

Then I thought it was just a phase and so I tried to consciously date non-white women. But it failed miserably. I just wasn't happy with my sex life. After three break ups I don't know what to do. I tried to be attracted to them. But when I was with them I had problems in bed. Like at times I couldn't get an erection. I have never had this problem with a white woman. And I could not reach climax a single time until I imagined having sex with a white woman. I had to imagine sex scenes from porn to help me reach orgasm.

I did find the women I dated beautiful though. But there was no sexual attraction. It's like I can look at Chris Evans and see that he is a handsome man. But I don't get sexually attracted to him because I am a straight man. Likewise, I can see women of other races are beautiful. But there is no sexual chemistry.