The 2 main stereotypes that Thai's have of foreigners with Thai spouses is that they are much younger than the man and they were prostitutes.
I was shopping at the local Makro with my wife one time and I heard a couple of women talking, "Oh, his wife is so old." Like it surprised them. She is a little older than I am.
But for some reason most people that meet my wife think she was a professor. I guess because of how she dresses. She was actually a banker.
Then I have a nephew that when he was a young boy always wanted to walk around holding my hand. I kept wondering how many people seeing us walking together thought I was a sexual deviant.