Your dog has one, your cat has one, you hamster has one, but you don’t, your horse doesn’t and nor does your bunny. Today we are talking about the penis bone.
It surprises most people to realize that most mammals have a bone in their penis. Humans are one of the few mammals lacking such a bone. Humans, and animals such as horses, elephants, marsupials, rabbits, and whales, must rely purely on a strong blood pressure to achieve an erection, while most other mammals have a baculum bone to give them a boner.
Why the heck does anyone want a Penis Bone?
From a human interest point of view the longest baculum found was that of an extinct walrus, it sold at a Beverly Hills auction for $8000. This particular fossilized bone was roughly four and a half feet long (1.4 meters). The saying should be “hung like a walrus”.
Fossilized walrus baculum are often carved and sold to tourists by Inuit and Alaskan craftspeople. They are also used to make into handles of knives and so forth. The baculum of most walruses is about 20 inches long (60 cm). These fossilized penile bones are often labeled as Oosik.
photo source – a Walrus Oosik
In other species the baculum is important for mating behavior to ensure species survival. It is hard to say why most mammals have them, and a few do not. Why does a panda bear need a penis bone, but a koala does not? As such even scientists are not to sure why some mammals have one and some do not, except to note that the bone may assist for animals who have longer, but less frequent, mating rituals.
What’s even more interesting is that where male mammals have baculums the female of the same species has an equivalent bone (smaller of course) known as the baubellum.
Of further interest, some historians interpret the Adam and Eve story where Eve was made from Adam’s “boney part” to mean that she was made from his baculum, and this also explains in biblical terms why human makes have no penis bone.
Baculum are present in other primates and size does not matter, they are small in many species, it is just the humans that failed to keep it up.