They hope to meet someone who will take care about them and will be happy just because they took this woman to America.
This doesn't coincide with notion of Russian women, who are waiting to be loved and cared about, because they leave their motherland and relatives for their future husbands.
It happened because western men are disillusioned about the women of their own country.
Most of these women just want to succeed in life, giving up family life for career. Western women don't even try to put make up to look seductive - they simply don't need it.
All the tricks and techniques that work with the modern Western and European girls, won't work with these lovely Ukrainian creatures.