I am a man that does not wish for a second childhood.
Who would?
Nobody wants to be a burden on their spouse or children.
My best advice for men to avoid a second childhood?
Get up out of the chair. Remain active.
Walk. Move.
Take two Advil and get a dog.
Go for a swim and lift weights.
When you find yourself watching TV for 8 hours a day, you will know you are headed in the wrong direction.
A kind of second childhood falls on so many men. They trade their violence for the promise of a small increase of life span. In effect, the head of the house becomes the youngest child. And I have searched myself for this possibility with a kind of horror. For I have always lived violently, drunk hugely, eaten too much or not at all, slept around the clock or missed two nights of sleeping, worked too hard and too long in glory, or slobbed for a time in utter laziness. I’ve lifted, pulled, chopped, climbed, made love with joy and taken my hangovers as a consequence, not as a punishment. I did not want to surrender fierceness for a small gain in yardage. My wife married a man; I saw no reason why she should inherit a baby.
-John Steinbeck, Travels With Charley In Search Of America