Overdoing self-manipulation (masturbation) converts too much testosterone into dihydrotestosterone(DHT). High levels of DHT overload the body causing baldness and possible prostate enlargement if blood circulation is poor in the prostate area causing a build-up of the compound. Reducing the frequency of your self gratification will help maintain low levels of DHT and avoid hair loss.
Im sorry Dr. Rassman but i study biology and im interested in hair loss and there is mountains of evidence to prove it. You dont even need evidence, its common sense. And heres why. If castration stops you from going bald, then anything that can get as close to the castration effect, to the point of almost castration such as no sex, masturbation, no erections, clearly DHT levels will be incredibly reduced.