As one who has never taken life too seriously, I'm probably guilty of lapsing into that state too easily while others wonder just what was funny..
Fairly recently, a visit from 5 year old Great Grandson. I'm sitting drawing pictures on scrap paper and he's guessing the result. Rocket ship standing on it's tail fins and a figure with big round bubble helmet, air tanks and big boots etc:
"What's that?"
" A Space Craft, GG " ( I get called GG for Great Grandad!)
" And who is that standing beside it?"
pause....
I say, "It's a Spaceman isn't it ?"
He looks at me and replies, " Don't be childish GG, it's an Astronaut"....