MABLU 
- Can't really comment on Mexican men, never met any. But as other posts have confirmed, there is definitely a cultural preference within ethnic groups, and white men in America want thin women. Read the personal ads, a great number of them say "slim, slender" woman only.
After reading several of imsken's posts, I surmised she was black, but you are correct, I was wrong in just assuming that. But if she is as big as she says she is, and the way she talks about her man, then I would bet on it.