>>16709639What incentive?
The only real incentives I know of are storing semen to impregnate your wife, avoiding it a couple of days to look forward to more intense orgasms, or if gooning is genuinely destroying your prostate and you already feel painful symptoms.
Jacking off is physiological, as much as having sex is. Would you say having sex every day is too much? twice a day? cumming 3 or more times in a single session?
One could outline goal based normal parameters for sexual activity. I could say ejaculating every 2 days is optimal for pleasure, ejaculating more than 2 times per session starts causing strain in your prostate's irrigation and pain, and that 2 sessions per day is harmless enough. You could make a study about people getting non-infectious prostatitis from long gooning sessions or going past these proposed limits, still that has to do with the use of your ejaculatory system rather than "masturbation" itself.