Here’s a funny, short, but also semi-informative video about an amazing monotreme, the echidna (there are actually four species in two genera). (There are two forms of monotremes, or egg-laying mammals: the echidnas and the platypus.)
I once got to play with an echidna named Francis at Harvard; it was being used for experiments on locomotion. Although it was too spiny to pet, it was furry underneath and very affectionate, with an amazing snout that was able to insinuate itself between my ring and my finger!
If you want to see that amazing penis (and you really should unless you’re squeamish about biology, which isn’t good for readers here): go see this video.
We’ll have more on animal genitalia, including Iceland’s amazing penis museum, later this week.