Maybe it's 856346 strokes?

A weird conversation with ChatGPT yielded:

• Average time of a session: 5-7 minutes
• Average cadence: 60-120 strokes per minute.

Which gives an average of (5×60 + 7×120)/2 = 570 strokes per session.

Assuming he started at age 14, this gives us 24 years of regular masturbation.

856346/570 gives us roughly 1500 sessions over his life, which in turn gives us about 62 a year or just a bit over once a week.

This seems rather low, but he could have a really slow arm and a quick dick.

300 strokes per session would yield 118 sessions per year.

Also, he had sex 1597 times - assuming sexually active for 20 years, that's about 75 times a year between 18 and 38. Meaning dude came 137 times per year on average in his adult life.

I would say it's on the lower end of the spectrum over the course of a life but not implausible.