When First World man meets Third World woman, the dynamic is always the same: he finds her exotic, falls for her submissive manner and tender voice, finds her slender body sexy, unlike the strident big-boned feminist man-haters back home.
The girl OTOH sees an opportunity to enrich herself, to obtain monthly maintenance for her family and village, and to get a passport out of poverty into a rich country where she will live the life of a tai tai happily after. For the non marrying sort, she'll just milk the man dry with demands for expensive gifts, fine dining, an apartment, and tall tales of sick or dying relatives back in the village needing urgent medical treatment, and then move on to the next guy. Or scamming and fucking several guys all concurrently.
The modus operandi is always the same; the details differ.