Rudy -> it makes sense, I'm afraid. Sex with a prostitute is just an entirely different story. It goes your way. You make the call. You make the decisions. You decide what will happen, when and how. You are "the master of the universe" in that situation.
Sex with a women who does it with you voluntarily is different. It requires communication, genuine interest and passion on both sides. Things will not happen as you want, but as the both of you want.
Sex with a prostitute is spiking dopamine as in sexually influenced dopamine addiction a.k.a. sex addiction. Here we go again with the discussion as to whether PMO addiction is different from sex addiction. It's not. It's the same mechanism, only different acting out.
But don't be let down, bro. You're on the good path - you got here by your own will, so you're taking care of yourself and your fighting. Keep up the good job!
cc19 -> Username posted some very useful advice, in my view. Keep up the good job, you're treating this thing seriously, which is obvious to me.