Researchers surveyed 700 people who paid for sex, from Europe to Asia and the truth is far different from the pop culture imagery and much nearer to that sad Russian picture about trafficking, Lilya-for-ever. I suggest you read the complete article, the various anecdotes are telling.

Although some of the men said they thought the women they bought ­enjoyed the sex, many others admitted that they thought the women would be feeling "disgusted", "miserable", "dirty" and "scared". Ahmed said he thought the woman might feel "relief that I'm not going to kill her".

And read this Wikipedia entry on Human Trafficking