I've been frequenting various massage parlors over the last 30 years. The reason I go is for the hand release at the end. (happy ending).
The first time I had heard about such places was back in the late 70's when I was just 17. I went in and paid the $25.00 at the time. They had a locker room with showers and then you went into the massage room. I started on my back and then turned over, Obviously I had a erection and was expecting the hand release.
The girl realized that I was under 18 and refused to touch my cock. She then told me it was fine if I wanted to do it myself. I had no choice, so there I was lying there, jerking off in front of this girl who was nice enough to take her top off for me. If was my first time doing it in front of someone and something I've enjoyed ever since.
The next time I went was after I turned 18 and from then on they did do it for me. But I'll always remember that first time when I was forced to do it myself.