In my case it is a life long thing. Introduced to it in the 50's by an uncle. Mostly off during school years. picked it up again when I started working. Had a road job for years. Built them in my hotel room to stay out of the bars.There was a break of about 10-15 years after I got off the road and into management positions. After retirement, I got back into it. I just love it. It is my best means of escape after reading.