• givesomefucks@lemmy.world
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      6 days ago

      We’re not sure.

      Theres a couple theories that put it on monogamy and society, basically that once we became “civilized” it was no longer needed to prolong reproduction because a woman wouldn’t leave and immediately have sex with someone else before the first guy’s swimmers finished the race.

      It’s probably a result of one of the many many bottlenecks our species went thru, one pretty far back because no modern human has a dick bone. But still after hominids split from primates.

      Whoever made it thru that bottleneck had no dick bones or ones so little it didn’t matter when they went away, so now none of us have it.

      I’d really be interested in if other hominds had it, would help narrow down the date. But good luck getting a study on neanderthal dick bones funded these days…

      Edit:

      Maybe bipedalism?

      Humans are one of the few animals that go thru life “dick first”, if we retained a dick bone, then if we walked into something, our dicks would hit it first. So that would be evolutionary pressure strong enough to make it go away. A broken dick bone probably wouldn’t be good for reproduction even after it healed.

      We could probably look at how much time primates spend on two legs, and find a correlation to how small their dick bone is on average

      But I probably need to stop thinking about dicks now.