- you can do whatever you want so long as it doesn't harm anyone else.
- buying sex from someone voluntarily selling it doesn't harm them or anyone else.
- selling sex to someone doesn't harm them or anyone else.
You see this clearly if you just imagine one example where prostitution seems okay, then you can infer from that single case that whatever seems bad in the other cases are external to the essence of prostitution itself.
In a free market a seller has a responsibility to their customer, if they are negligent then they will lose.
What responsibility does a prostitute have to her client?
Prostitute that know's who her clent is
She knows her client is married
Does she go ahead with the transaction? Is it moral or immoral?
She might have a decease, that could affect her clients wife?
She might get pregnant?
Her client isn't married
All well?
Prostitute that doesn't know her client
Does the lack of knowledge absolve her from moral responsibility?
She might have a decease, that could affect her client's wife?
She might get pregnant?