Did you know that King Mongkut of Siam, the real-life inspiration for The King & I, sired an amazing 81 children? As if that weren't impressive enough on its own, consider the fact that he was a celibate monk from the time he turned 20 until he turned 47. He had a whole lot of time to make up for.
He's not even the most prolific father on this Ty.rannosaur.us article featuring 7 Incredibly Prolific Fathers, either—Genghis Khan supposedly had somewhere between 700 and 1000 children and there are now at least 16 million people on Earth carrying his genes. That's one heck of a family tree!