Prostitution is not legal in the US, and even when it is legal elsewhere, it is not encouraged. One reason is that it makes sexual intercourse a transaction. More specifically, it makes it a transaction that is bound under contract law. This is not what women really want. It is must better for them to make the circumstances under which sex happens much more ambiguous in nature. In fact, much of the legislation (e.g. yes means yes) and other initiatives (e.g.kangaroo courts on campus) are driven by this. For with ambiguity, many games can be played. Especially when by the law’s definition, she is the gateway to sex.
For starters, there is the classic “lead him along to get something out him” strategy. What she wants might be dinner, a ride, a car repair, rent or whatever. There might be some sweet talk, some coy looks, etc. But not too much. And when the time comes such that he might expect a payoff, none.
In modern times there is the issue of sex after marriage. For eons it was understood that the man would provision and the woman would provide sex. Notice the word understood. Things have changed. After the marriage, the man is expected by law to provide provision, while women claim that there never really was any understanding that they would provide sex; the ambiguity of the long standing traditions and all.
And lastly there is the notion that since sex can never be a transaction with agreed upon contract rules governing it, then she can arbitrarily make up the rules as as she goes along. For, once again, she is the one who is legally the gateway to sex. All sorts of nasty things come from this, regret rape, false accusations, blackmail, etc. Since standards about how women should behave are passe, pretty much anything that she can get away with is legal.
This system will not work in the long run. It is not really working now.
NAWALT of course applies