Penis Bones

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.

photo source

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.

Other Reading

Penis Fencing

Adam and Eve in Evolution

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11 Responses to “Penis Bones”
  1. papaleng Says...

    On August 3, 2011 at 10:56 am

    Another new fact was added to my knowledge. Never heard of penis bone before. Why do humans forget to maintain this bone?

  2. papaleng Says...

    On August 3, 2011 at 11:06 am

    another good read. Just also thinking, Why do human forget to maintain this penis bone?

  3. Jimmy Shilaho Says...

    On August 3, 2011 at 1:58 pm

    Its all because of evolution that mine disappeared, but then, I want to imagine how misused it would be if it were still present!

  4. BradONeill Says...

    On August 3, 2011 at 3:15 pm

    i would guess the mechanics of a penis bone would be very interesting. does the bone basically stay in the same place or does it shift into place with arousal. Personally i am happy with the current system for humans.

  5. Milton H Peebles III Says...

    On August 3, 2011 at 3:20 pm

    Very interesting. enjoyed reading.

  6. sloanie Says...

    On August 3, 2011 at 6:02 pm

    Its interesting having a penis bone would, could be a bone-us!!

  7. Karen Gross Says...

    On August 3, 2011 at 7:13 pm

    Fascinating! I had never heard that Adam and Eve story.

  8. PR Mace Says...

    On August 3, 2011 at 8:11 pm

    You know that was educational and funny at the same time. I guess males can no longer say they have a boner as they don’t have a bone.

  9. lcoffiejr Says...

    On August 4, 2011 at 12:34 am

    strange, but interesting

  10. Marlene Taylor Says...

    On August 4, 2011 at 11:44 pm

    I never knew this. Very interesting. I wonder why humans don’t have one.

  11. PruandMe Says...

    On August 11, 2011 at 9:22 pm

    funny and educating at the same time . . . “hung like a walrus” OMG!


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