1st one- naive young man in 20s, got played by an older thai woman who essentially wanted a white sperm donor (she admitted this lol). This kept me coming back to Thailand for long periods.
2nd one- ex just got pregnant and kept the baby.
3rd and 4th- current partner for last 5 years. Just happened.
Obviously its a 2 way street but there is a certain cohort of thai women who actively seek out foreign men and whilst I was happy to oblige as you can see a few certainly got what they wanted out of it.