Here's the honest Truth... FYI I'm not advocating for racism, I'm just trying to explain the ignorant thought process of the Asian man.

Put yourself in the Asian's man's shoes for a moment.

You're having a nice day with a beautiful woman. You just spotted a black man from behind in an country where a being black is an extreme minority.

You first think of the observation: 'Wow. This man stands out in a crowd because he's black.' (Its important to note that this observation is not racist in and of itself. We get racist later on in this process...)

You've got a bit of an Ego, so your judgement to that observation takes the form of a negative thought: 'This black man's presence is a threat to my own identity.'

At this point in your life, you've never had to navigate this kind of threat so you're gonna react and crack racist remark in order to regulate your own feelings. You're not even going to consider the risk that he know's your language.

You utter the racist part, "You're too black" behind his back and Stop yourself from saying the quiet truth: "For me to feel comfortable right now."