There really isn't a specific answer to your
The general answer is that society
devalues women and thus allows them to be treated
that way. One answer is that women are used to
finding value through their beauty and sexuality
and thus have come to use that to gain some power.
I think that some women in the sex industry say
they choose it -- but most feel like they didn't
really have any other choice.
We can't blame
the women, but the industry and what is going
to change this scenario is to finally single
out those who indulge on this and examine why
they make those choices, instead of always looking
to "help" the women -- good luck.