I completely understand. My younger years were packed full of pretty intense experiences - D1 athletics, the military, building and selling a startup, building and test flying an experimental aircraft, etc, and not much feels new anymore, even though I'm relatively young.

I used to teach skydiving and watching the student's excitement during the first several jumps always brought back strong memories the initial joy. It was like reliving my first jumps.

I wonder if raising kids - sharing life experiences with a young person - has the effect of reliving the initial experience.