Rand Richards Cooper has a great essay in the NY Times Magazine about becoming a new father late(r), in his forties:
The prospect of life and death in the balance brings a metaphysical dimension to what I began calling “late-onset fatherhood.” One day at the gym I showered next to a guy busily shampooing his 4-year-old son. “Not on my forehead!” the boy cried. “Why not?” his father asked — and before the boy answered, I knew exactly what he was going to say: “It gets in my eyes!”I used to think my big dad advice epiphany was to tell guys to do more pre-skiing exercises before the kid comes, strengthen the knees and the back. See, *I* learned to ski before there were snowboards, and we only had moguls and--bah, you young punks never listen. Why don't you just go mash up some music?
With perfect clarity I recalled the outrage of that stinging discomfort, and my own father saying, exactly as this father now said, “Then close them!” I thought about how having a child extends you through time — genetically into the future, but also into the past, reconnecting you to perceptions and experiences you have all but forgotten. I felt tired of living only in the present.