Testicular Growth: This very well could just be your maturation process and the dominant testicle is working hard to keep up with the production of sperm for your semen. Masturbation is a very normal and common human activity. Most men masturbate and many masturbate as frequently as you do. But, you are closing in on the age when testicular cancer raises it's ugly head. If things appear abnormal please ask help.
Answered 3/1/2016
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