I saw a two-line joke in the Saturday Evening Post 50-some years ago. Thus a poem of sorts, and then a song. The poem is as follows:

Come all you young maidens and listen
And gain some instruction from me.
Be modest, demure, and retiring,
And chase not the bachelor so free.
Oh, do not act bold, free, and brazen;
Be modest, retiring and shy.
Men flee from the woman who chases
And the brazen young lady pass by.
But the modest girl does not chase bachelors
As doubtless you have been aware,
For the modest girl does not chase bachelors
As the bear-trap does not chase the bear!

Dave Oesterreich