It is sex, and it is two people doing it and agree to do it. What is the real difference in Bob who is married, and his wife "cuts him off" till he takes her on a trip, or something else.
She is still using her "sex" to get something of value, but since they are married it is ok.
Julie needs a place to stay, so she meets Tom, she tells Tom that she would love to stay at his place. Does she love Tom, no, may not even like him alot, but needs a place to stay.
So she is trading sex and other duties for a place to stay.
Take Johnny who is in high school, (but of legal age of course) and he knows he has to take her out to a movie and dinner and flowers and most likely she will come across for him. What is all the money he pays out but in so many ways a payment for the sex, but in a socially acceptable manner.
It is a outdated legal system. based on the idea that "sex" is bad or wrong. If Ricky really wants someone in a lamb costume who will whip him first and can't find a girlfriend with those desires, but can pay a couple hundred dollars for it ( not sure what lamb costume ladies cost) who exactly is it hurting.
If prostitution promotes Ex's examples and your examples and also results in a decrease in sex related crimes then it is right. It prostitution turns out to be promoting the opposite then it is wrong.
On this basis prostitution is satisfying the principle of utility. Promoting the greatest happiness of the greatest number.It is probably important to distinguish between right/wrong, good/bad for the purpose of this exercise because they don't necessarily means the same thing
Deciding the benefits to society of prostitution stresses upon the EFFECTS prostitution has on society. In other words, it looks at the CONSEQUENCES in order to determine the rightness or wrongness of an action.
I think the young lady in question was alluding to the MOTIVE from which this action is done. Now that is a different story.