Talk about stamina.
Meet Diego. This more than 100-year-old Galapagos tortoise is having so much sex and so many babies, he's saving his species, according to the AFP.
He's a very sexually active male reproducer. He's contributed enormously to repopulating the island.
The giant tortoise is father to an estimated 800 tortoises on Espanola, the southernmost island in the Galapagos Archipelago.
Mr. Diego is part of the Chelonoidis hoodensis species, which was extremely close to extinction 50 years ago when there where only two males and 12 females alive on the island.
His success with the ladies could be attributed to the fact that he lives in an enclosure with six females.
But it could also be his charming good looks.
Diego weighs in at about 175 pounds, is 35 inches long and 5 feet tall "if he really stretches his legs and neck."
Diego was originally found at the San Diego Zoo and then put into captive breeding in 1976. And he hasn't stopped since.
Diego is now father to nearly 40 percent of the offspring released into the wild on Espanola. About 2,000 tortoises have been released. Diego is responsible for about 800. Think about that.