Freedom from a meaningless life
Your life is empty. Everything that has to do with your life is unfulfilling: your job, your girlfriend, wife — or lackthereof, and your filthy little masturbation addiction. You jerk off so much because you have nothing better to do, right? All that time, touching your dick, which could be applied to more productive matters like improving yourself or developing a useful skill or hobby. Aren’t you sick of that?