The Urge To Be Teacher

I assume it's fairly common among men (perhaps among women too) at some point in their lives to want to be a teacher. It's an urge to help the younger generation, to show them the way, to give back to the society, etc.

But I wonder if it's really a manifestation of another common wish - to go back in time and meet one's younger self, and give some real good advice! Something to ponder...