WHEN YOU ARE OLD AND GREY
(Tom Lehrer)

Your teeth will start to go, dear, your waist will start to spread.
In twenty years or so, dear, I'll wish that you were dead.
I'll never love you then at all the way I do today.
So please remember,
When I leave in December,
I told you so in May.

Recording by Tom Lehrer: https://youtu.be/8NOZH0y7VxE