"Old men or young men - all shall fall to the harvest of life eventually. Thus decrees Nature."

...

"In other words, don't try and guilt me, grandpa. Don't worry, though. Things started growing right back when the first fusion plants started appearing. I've already grown some of these myself. They grow very quickly, actually."

A faint pause.

"...I should probably sentence you to a longer punishment, come to think of it."