Do pornstars suffer from Dopamine abuse?

Hey everyone, so I was thinking about this random question yesterday. I like to base my ideas in Science as much as possible, and we know one of the main theses on just what's so bad about porn is the dopamine abuse caused by constant masturbation and pornography, which leads to all sorts of negative effects in general. I was just wondering if Pornstars go through through the negative effects of dopamine abuse. I imagine their dopamine circuits are quite messed up because of the constant good feeling they get.

Or could it be possible that people who have symptoms of Dopamine Abuse from excessive masturbation have a genetic predisposition to Dopamine problems?