The Philosophy and Morals of Paying for Sex

[EscortInspector]

Paying for services is an integral part of modern societies. If my home needs to be rewired then I employ an electrician to do the job, so long as the electrician does a satisfactory job and I pay him the agreed fee then there doesn't seem to be any ethical or moral issue with the contract. The same cannot be said for sex work and this is an issue I would like the community to explore through discussion.
What is it about paying for sex that makes it different from any other service?
What makes an action right or wrong? Is it the outcome? Or are some things just good or evil?
Is it possible to freely choose to pay for or accept payment for sex?
Just because something is illegal does it also make it immoral?
Is the activity of sex in a different class to other activities such as dancing or football?

Below I will list(not exhaustive) some common objections to sex work, bear in mind that I in no way endorse these objections but I think they would serve as a prompt for discussion:
1. Sex work is part of a suite of services offered by criminal gangs: if you pay for sex then you are supporting criminal activities such as trafficking, violence and the black economy.
2. Sex work is a danger to public health: sex work involves increased risk of diseases, everything from the common cold to HIV.
3. Sex workers are modern slaves: sex workers are trafficked by criminal gangs and forced to work, nobody would freely choose to do such a job.
4. People who pay for sex are degenerates: if someone has to pay for sex then there must be something wrong with them, morally, physically or psychologically.
5. It is inappropriate to commodify sex: sex is a byproduct of love, sex is for procreation, sex is with someone you know, sex is sacred, sex is different etc etc.
6. Paying for sex is wrong: it is objectively wrong to pay for sex, it doesn't matter how it makes you feel or if it is a contract freely entered into, some things are right and others wrong.