Society in some cases has made women think that their bodies are there to be used and its all they are good for. Some women aspire to be topless models for Nuts, because society has made them think that this is ok.
What's wrong with that aspiration? I'm pretty sure the topless models for Nuts earn more than I do and will be able to retire much earlier than I will be able to if they manage their money well. Some of them clearly enjoy doing it and enjoy the attention they get. Others perhaps don't enjoy it but have realised that it's very profitable. Others still may have realised that it might allow them to get into the circles where they could bag a footballer husband and be set for life that way.
How are any of those above scenarios "exploiting" said women? It's just an easy route to fame, adulation and money if you have the looks for it.
There are women who get pushed into drugs and exploitation/prostitution but that isn't anything to do with the girls that are in magazines etc. It's the more underground stuff that isn't in the public eye that we need to worry about.