Being outstandingly good-looking, they are at the same time very modest and tender.
They try to surround their husband with warmth and care, make him feel like a knight who protects his girl from all possible problems and challenges in life. Are those all the advantages that Russian brides have?
Men have always valued women who are in some way mysterious, and Russian women are what they need in this case.
This way the "mail order brides" companies appeared.