Thai people are shy. Parents educated them to mistrust strangers. A woman never accosts a stranger alone. If one behaves this way, she might have a bad thoughts in her mind. If a Thai woman smiles at you in the street, it is not at all an invitation.
Thai women are married to German men.
But also in many other countries Thai women marry westerner men. For some of these women it might be a solution to escape a certain poverty in Thailand, a way to increase their social status and way of living. But for a lot of them it is a way to have a life different from the one imposed by Thai society. Indeed Thai women status is not equal to Thai men status. T hai society is still a society for men.