@Bruce ********
I would suggest that is the biggest reason why, yes. Of course. Mate selection is the most important driver of human behavior.
Men are primarily attracted to youth and beauty, and women are primarily attracted to social status. There is plenty of empirical evidence in the evolutionary psychology journals demonstrating this cross-culturally. Statistically speaking of course, individual humans span the spectrum.
For me that is absolutely why I came to SE Asia. My social status here provides me with options for a mate that are far superior to my home country.
But that's not the ONLY thing. Personally I love the Thai culture in general. I find people here to be more kind, warm-hearted, and tolerant than anywhere else I've been.
But at this point we've gotten so far off the original thread's topic I hesitate to converse further on the subject. If you like, DM me and we can discuss these ideas further.