I don't know....I have been on and off the no FAP a few times over the past years. Currently on it again without masterbating for about 4 months. From my experience the problem is not in masturbating but more with masturbating to porn too frequently and for too many years. One thing I have noticed is that I went on a big health kick 7 months ago. Cut back on alcohol. Started running again and doing a bit of weight training. Lost 12 kilos, look and feel great and after a couple years of not happening the morning wood has returned.