Women from Ukraine (and Russia) are predators and know exactly what they are doing, it comes around from the twisted demographic imbalance before and the lack of good husbands around. They understand they look incredible, and that men are simple creatures, so they can weaponise their body in return for security and money.
I have many Facebook friends from Ukraine, most of whom fled to Europe, and the ones who were single have shacked up with someone and they are having a wonderful time by all measures (trips to bali, new car, nice meals in restaurants etc...), they landed well off guys and all they need to do is keep looking pretty and fuck them. At least one is already engaged.
The tales above boil down to love bombing; extreme acts of affection/'love', which most guys have never experienced, at least not from a pretty woman. Their 'second brain' takes over, they believe the talk of love and marriage and being 'the one', and fall into the Venus Trap, which at the time is a lot more inviting than having to talk to someone who has a functioning brain, is an equal in the relationship and can push back.