Is it normal that i crave black cock?

I'm a male now 30 years old and for the past 5 years I can't stop thinking about having a big black boyfriend.

My fantasy is to be completely submissive to him and do everything I can to please him sexually. It turns me on so much and I have no idea why. I just fantasize about being the bottom and dreaming of a him being my master and think of all the sex positions he would put me in.

Previously I've only thought of women and still do, and even had a couple girlfriends but I just can't get this fantasy out of my head.

I really don't know what to do but I need to make a decision really quickly. Am I just confused? Thanks.