I'm 32 and have a very high sex drive, I tend to masturbate once per day but I think that this a little excessive at times because every time I masturbate, I use some variation of porn, varying genres etc and I think porn is more the issue not the masturbation itself as I do feel .. idk, unfulfilled after masturbating with porn for the most part.

I think there is some truth to the claim that an excessive amount of porn can cause a disconnect with yourself and real life sex situations, you have a certain expectation and sometimes your expectation doesn't match with reality so this may cause you to underperform or whatever.

Personally, I think masturbation or excessive masturbation more specifically leaves you feeling a little lethargic so I did actually conduct an experiment with myself where I didn't masturbate for a week and despite still getting the same amount of sleep (6 or 7 hours), I felt a lot more energic and lively with more energy in the mornings vs the counter-part.

There is always a chance that it's placebo but I think I definitely felt a lot better when only masturbating once or twice per week.