http://www.menshealth.de/sex/penis/masturbation-ist-gesund.1 8074.d_mh_artikel_alle.htm
"Wissenschaftliche Untersuchungen bestätigen klar, dass nach dem Masturbieren der Testosteronspiegel im Körper deutlich ansteigt"

http://www.virtualhaircare.com/virtual%20salon/hair%20loss/w hatmenneedtoknow.htm
"Testosteron kann den androgenetischen Haarausfall auslösen oder verschlimmern"

The first thing we have to say is that even though you want a fabulous physique don't take steroids if you want to keep your hair. Both male hormones such as testosterone or hormones such as cortisone can trigger or aggravate genetic hair loss, the most common type of hair loss experienced by men.

http://www.4-men.org/malehairloss.html
Reducing the frequency of your self gratification will help maintain low levels of DHT and avoid hair loss.