Under socialism?
I’m not sure, but my guess is something like:
Workers councils work to create safe/nice working conditions allowing individual workers to work under the model that works best for them (streetwalking would probably go away because even if it were 100% safe, it’s not very comfortable having to be out in the weather and it seems like an inefficient model for both worker and client, particularly in terms of carbon emissions). I imagine most of us would choose to work in worker one cooperative brothels/dungeons/clubs/etc (though we’d set up a system for guaranteeing the safety of those working alone), for outcall work we’d have check ins with the workers council to make sure we’re safe. Workers councils would do things to try and eliminate competition between workers so that clients can’t pit us against each other to depress pay (ideally we’d have managed to eliminate racism, transmisogyny, and other factors that depress pay for workers from oppressed groups, otherwise we’d probably have to institute some kind of distribution system so that sex workers who are oppressed on various axises can be treated fairly until we manage to dismantle those systems)
Since everyone has a guaranteed basic income that covers basic necessities plus a good bit extra, no one will do it out of economic necessity. Male sex workers will probably see an increase in demand as more women feel empowered to pay for sexual services. I imagine if we had worker shortages in any industry we’d probably advertise the need and people who had an interest could come do it.
Once we have full communism money will probably be obsolete and we’ll probably just do it as our way of contributing to society (if we want). I like listening to people, and helping them explore their sexualities, even though it’s not sexual for me, seeing people opening up and being happy gives me the warm fuzzies, just like giving people makeup advice gives me the warm fuzzies, if I didn’t have to do it for money I’d probably take fewer clients and mostly the ones who are working themselves through things. I think under full communism we’ll probably also get paid in tokens of gratitude (as well as with the continuing functioning of a society where all our material needs are provided for with anyone being forced to work, I think that people don’t need to be forced to work, we’re naturally industrious and most of us get bored and depressed if we don’t help our fellow humans/contribute things to society) so thank you notes, and things like that, there might be some sort of website set up for people to send thank yous to people who’ve provided things for them, so one could for example send a thank you note to the people who work in the factory that built your sofa, because hey, some people like building things and people like contributing, and so if we make it easy for people to plug in and do that they will.