Sport Climbing at Echo Cliffs, California

I recently had a conversation with my dad (post-epic bike crash and stitches in my forehead... more to come on that one later) in which he asked me when people like me (climbers, thrill seekers.. etc.) stop doing what they do... what age are typical climbers? I answered, "well shoot dad, I know climbers from age 8 to age 60"... "ya, ya, but when do most climbers stop climbing?".... I think I answered, "well unless they've fallen out of love with climbing, then never... unless their wives make them."