It's just going to be underpaid immigrants in robot suits isn't it.
Sex with robots seems like an engineering liability nightmare to be honest. When one malfunctions if the partner has a cock it's gonna get snapped off and if not well that thing is gonna have the same liability problems as a sex machine that independently chooses how hard and fast and deep to go.
Honestly sounds so high risk most capitalists would steer clear of it, meaning it'll only be a very small scale thing or hobbiest. Look at how expensive realistic sex dolls are too, add a robot to that and it's going to be way out of the price range of everyone except millionaires.