[PatrickHenry]

There once was a conqueror named Ghengis,
Who had a hyper-active dingus,
With each city he captured,
Another maiden he enraptured,
As history and genetics both explaingus.

[VadeRetro]

Genghis Khan
Only had one.
But he got it done
That son of a gun.

[VadeRetro]

Genghis, that priapic Mongol
Made whoopee with many a strong girl.
So many descendants
Would be his dependents ...
His tax bill would not scare a Scotsman.

(OK, you try rhyming with "Mongol" sometime.)