Excellent game, with so many option I do have question though how to find and unlock prostitution? Between working 7 dollar job and all things having high prices and sending money home you can die of starvation in this game.
So far, There's no brothel, streetwalking or call-girl services anywhere in the game, so the 'Whore' perk only applies to situations like random quickies, school blowjobs and lost bets at the Arcade tournaments, where the MC gets to fuck the winner or participate in a blowbang and gets paid for that, the loser.
As the other fella said, camming brings the most $ and is sex work, but it will take a while to gain popularity for this activity to be really worthwhile. Also, one action in the webcam session lasts 30 minutes, regardless whether that's just playing with breasts or tugging nipples or sucking the partner off, and the MC needs to perform a couple of such actions to earn enough tokens. This results in the webcam session taking a good part of the day (10 requests granted is 5 hours spent), leaving the MC tired, hungry, dirty and... stressed. Currently, the webcams have limited content and you can only fuck your camming partner (if you have one), but it has to be requested by the audience and usually is not the first think they'll ask for.