What dose it mean to fetishize a race? 😕

Zaria
I'm a bit confused..... So I have a preference for Asian guy, right? And while on social media I see people calling others out for fetishizing Asian guys. I was also accused (jokingly) by my friends. To which I disagreed on. 
But now that I think about it. I really don't know what qualifies as fetishizing. Honestly, I don't see how someone can do that to a Whole Collective Race. 
I know that having a preference and fetishizing are two different things but know I'm second guessing myself. 
So please help me, what qualifies as fetishizing a race? How do I know I'm doing it?Â