I've seen the girls at the Asian massage places and some of them( not all) are really beautiful and sexy. And nice. It's really sad that they're trafficekd.

How do they get trafficked? And are they there for life?

There are issues with the exploiting of women of all backgrounds

Next not near all of the girls who work at massage parlors are "bought here against their will or work against their will"

And there are even more problems with just "slave" labor in general, working at eating places, factories and more.
I have seen places in Atlanta where they house employees on mattress on floor in back of factories and worst.

Many are keep until they are no longer useful