As an Asianboi, I need some advice

Hi everyone. I'm an Asianboi from China, and I have a gf. I couldn't stop having fantasies about her with a white guy, but I'm not sure whether I should actually bring this up with her.

Fortunately, I've already managed to get her to accept my submissive side. It was difficult at first. She thought it was a little strange and awkward, but over time she became completely comfortable with it and now she's gotten used to be the dom in our relationship.

There's also something else I've noticed recently. Every now and then, she makes comments that sound like she might be implying that foreigners having larger size...Or maybe I'm just reading too much into it, and it could simply be a coincidence.

So...I'm wondering what you guys think. Should I tell her about my whole fantasy, especially given that she's already comfortable with me being submissive? Or would bringing it up potentially make things unnecessarily complicated?

I'd really appreciate some advice from white masters and asian goddesses from their own experience, or fellow asianbois who have been in similar situations. Thank all of you in advance🙇