Why can’t he stay tuned?

Because men are not static creatures.
Men are engineered for motion.

Their nervous system is built for seeking, hunting, building, solving.
Left untuned, that energy will seek its own target — not necessarily the right one.

Nature didn’t make men defective.
Nature made men responsive.

Responsive to placement.
Responsive to return.
Responsive to completion.

Without this, a man does not weaken because he is flawed.
He weakens because his architecture assumes he has a place to return.

No place = drift.
No place = wander.
No place = noise.

Tuning is not fixing him.
Tuning is meeting him at design specifications.

It’s like asking why trees drop leaves.
Why tides recede.
Why the sun sets.

Because it’s in the blueprint.

He is built to rise.
He is built to leave.
He is built to return.

Without return, he's adrift.

References

Young, L. J., & Wang, Z. (2004). The neurobiology of pair bonding. Nature Neuroscience.

Georgiadis, J. R., & Holstege, G. (2005). Human brain activation during sexual stimulation of the penis. The Journal of Comparative Neurology.