First bike when I was 7. Early in JFK's presidency. Started tinkering with bikes (turning 3-speeds into 6-speeds, etc.) when I was 12. I count my riding days from my first 10-speed when I bought my UO-8 at 14. That was 52 years ago. (And that seatpin is still in action on my Peter Mooney. It's perfect for the brake cable hanger for the cantis and far better than the Campy pin that came with the frame.)
Ben