Tuataras are lizards that date back to the dinosaur times, and have long lifespans. Henry, lives in the Southland Museum in New Zealand, and in 2006, at the ripe old age of 111, mated with an 80 year old female and had 11 babies. This helps bolster the endangered Tuatara population, and virile Henry shows no signs of stopping anytime soon.

Only took him 111 years to work up the libido.