From the comments on this post at Ms. Seipp's I found out about Scientific Gospel, with whose songs and mission I agree and disagree (I can't think of how to put it less cacophonously) on a number of points, but these lyrics are too good not to quote:

The Father of His Country

They've made some observations on our Y chromosome
Reflecting ancient nations and genes that strayed from home.
The message in the bases is sixteen million men
Have DNA with traces of common origin.
We find them in each nation where Genghis Khan once rode.
The simplest explanation is they're the seeds he sowed.
The general direction of Mongol ravishment
Just followed his erection across the continent.

CHORUS:

You hear them hooves a' drummin'; the Mongols on a raid.
It's Genghis Khan a' comin' and he's looking to get laid.
Now Genghis was a leader whose armies conquered all,
And even greater breeder as genes today recall.
With every new encounter as he rode into town,
If female, he would mount her, in hay or eider down.

CHORUS:

Mongolian armed forces could range both far and wide.
Give credit to the horses the cavalry would ride.
Though tired and heavy laden, they'd wait to eat each day
While Genghis and some maiden were rolling in their hay.

CHORUS:

When Darwin wrote of fitness, he meant to reproduce.
Y chromosomes bear witness that Genghis could seduce.
And then, of course, survival of offspring is the thing.
Reminding every rival, it's good to be the king!