Now that I come to think of it, beauty crosses all racial barriers, but perhaps we notice it more in a woman from another race.
One of the most beautiful women I remember was half Indian and half Arabian. Another was Indonesian. Another was Japanese. Some African girls have curves that hit you like a train.
I might not be particularly impressed by a white girl with small breasts, but an asian girl with small breasts can be stunning!
In a physical relationship, many things are important, but women of different races feel different, and that can be sensational.
The way people from different cultures behave in a relationship can also be very appealing at first, but it can take a lot of patient effort to make it work long term. Nobody is quite so understanding, but can be quite so boring, as someone just like you.
I love the attitude Asian women have to most things, including bdsm. I'd love to have that kind of relationship with an Asian woman.