Actually the physicalness of actual sex with another person is quite different than masturbation, so I will disagree with you there. Even the testicles know the difference between fucking and jerking off, as sperm is higher in quality and quantity for intercourse vs. masturbation.
All that to say that while you will not die if you do not have sex it is not a trivial need either and should not be sacrificed lightly, especially for ideology. [1]
"Because changes like this (legalizing sodomy) can have greater impacts that involve all of us even if we don't particularly care for gay sex personally."
You do realize that many of the arguments beig advanced to argue against sex work have been used against gay sex, right? [2]
I mean are you going to suggest that the individual is sacrosanct and has no obligations to the society within which they live?
No, of course not. But at the same time, an individual is the most important unit, and as such his or her freedoms should not be restricted needlessly. [3]
I consider myself largely individualist but I also recognize that this has limits and at a certain point your personal ability to do whatever you want must by necessity be curtailed to maintain a stable, healthy, and productive society.
Again, same arguments about vague threats to "society" have been made against legalizing gay sex or gay marriage. [4]
The most essential definition of anarchy I have ever heard is "Freedom without obligation" and to me that is spot on. Now I'm not necessarily saying that the sky will fall if we made prostitution legal tomorrow, but can you say with any real certainty or confidence what the consequences could be 50 years down the road? Its important to think about these things because culture and social attitudes don't change on a dime the way an economy can (Relatively speaking of course)
Prostitution has been described as the oldest profession in the world. While that can be argued, we know it is probably older than humanity. Like gay sex, it has been around for a long time and I doubt either will bring down the society. [5]
3. One tends to promote stable and healthy intimate relationships and foster families which by and large are a necessary component for people in general to feel complete and fully realized, and in doing so has a trickle effect onto society at large. Do you never think why it is the most politically unstable parts of the world tend to be filled with young unemployed boys/men with no wives? Idle hands are the devil's playground as they say. It's a dangerous state of affairs to have too many men and not enough social roles to go between them all. I'm not necessarily saying prostitution can't be justified along similar lines of promoting public welfare but that's my answer for what it's worth.
I think public good should be furthered while causing least restriction of lives of individuals possible. Restricting ability of consenting adults to engage in sex for money is a big restriction of individual rights. Unless you can show that this is the only way some important public good can be achieved, other means should be employed instead.[6]