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Why some animals have a baculum shaped like an ice cream scooper

The “baculum”, or penile bone, is one of the most mysterious structures in mammalian biology. To date, no one really knows what it is doing and why it is missing in humans, horses, elephants and some other species.

3D analysis of 82 penile bones of various animals shows that some of the strangest shaped penile bones prolong sex very long, induce ovulation in women, and sperm from other romantic encounters. I found that I could scrape it with a shovel.

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