Hi clementdale and welcome to ehealth: I was just shocked when I read the answer to this...That being:
"Recent advances in the treatment of male pattern baldness have revealed that hair loss in males is directly related to DHT and the amount in your body. Numerous topical shampoo's and pills have recently come out to treat the effects of DHT on men's bodies.
The production of DHT can be linked to testosterone. But is there a link between hair loss and self gratification?
Overdoing self-manipulation 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."
In thinking of the male vs. the female in masturbation, I believe that the male must put much more work in achieving his orgasm that could cause this...Saying this, this could also cause some erectile dysfunction problems...
I found your to be an interesting and informative question...Take care...
Caroline