Side Effects of fapping to much.
-copulatory impotence (can get it up for porn, but not partners)
-growing erectile dysfunction, even with extreme porn.
-frequent masturbation, little satisfaction ("feeling like a lust-ball all day")
-morphing porn tastes that don't match sexual orientation (HOCD)
(watching gay porn if straight)
-severe, worsening social anxiety
-fatigue, irritability
-lack of motivation, depression, anxiety,
-inability to concentrate, brain fog
-distress about escalation to more extreme porn
I'd say 2-3 times a week is safe.