Why are there mail order brides?

LatinaAngel asked:


why do some guys buy there wives off the internet,the ones i hear about the most are russian mail order brides.Why do these women do this and sell themselves like this?I remember an episode on Tyra where she had a few russian mail order brides who were bought and their marriages went terrible,the husbands were abusive,physically and emotionally and forced them to do weird sexual acts.

Why do women do this?
Why do guys buy their wives??
why should someone pay to get a spouse??