https://www.google.com/search?q=social+stigma+prostution+nor...
EDIT: "Social stigma" that looks like, sounds like, and feels like social stigma passes the "duck test." It essentially is social stigma. It doesn't matter so much for the question of its existence who in particular it originates with.
But yes, if we define "social stigma" so broadly that it includes legitimate concern for individuals and groups, there is also social stigma against pedophilia, I guess.
In most contexts "outside of my social circle", "sex" itself is generally seen as humorous/inappropriate topic, for reasons that I don't think are due to sex being seen as shameful or worthy of stigma, although many claim that this is the case. So if I did what you suggest, there would be confounding variables, would there not?
I think if my boss and I (he counts as outside my circle, no?) were both drunk in a bar, and I mentioned using a prostitute, his jaw would stay well off of the floor. I think this is true of most men, even the conservative Republicans ones who act otherwise in more "family" type situation. I will suggest that you try it, maybe I'm wrong.