Asian girls

Weather is good here, not so cold but little bit windy.

Today when I was waiting in the bus stop to get back home. I saw an asain girl, she smiled at me as if I knew her. Ah....I try to think. Yes! she is one of the classmate from the previous school, she is from vietnam and she is about 20yo. Such a young girl! I do not really remember her,because she does not speak English nor Finnish nor Chinese....She only speaks vietnamese. But one day she really shocked me, that she said she is 20yo, and her husband is 48yo finnish. (in Finnish, because this was one of the pratice that teacher wanted us to do)
God! Then I asked her what language they speak at home? She is very proudly replied " Suomea!" ( Finnish) . Well, for me she did not speak finnish that much....
But why is she here? why is she married a finnish man with such age difference? All the questions in my head. But I could not find the answer, since I can not talk to her in any languages I can.
Well, after that I heard alot things about asian girls here! Even one time one of the classmate asked me " Are you married to a Finnish, as the other young Thai girls, they are all married pretty old men here." What??? Why he asked me like this and this kinda question?
Ok,I know somethings like this before.But never think it is really related to me. But now it seems different.I feel sad about this! And feel sad about the girls if their goal is to come here then to marry any men here.