>>29659710
>Like to me it makes more sense that we would "lay" egg "turds" rather than slugs
That might make more sense to you, but it doesn't make any sense from a Darwinian perspective. In order for a species to evolve to be doing something, there has to be some evolutionary advantage for doing so. There is no advantage to what you describe, other than it would make things neater and tidier. But being neater and tidier just seems great from a human perspective, but it isn't from a Darwinian one. And in order to ecapsulate shit into an egg shell like you're suggesting would greatly complicate things. A lot of calcium would need to be dedicated to create these egg shells. It would make things harder to push through the digestive tract, because that egg would need to be lubricated somehow. The soft brown slug that is a turd is self lubricating (to a point). Even turds can be hard and cause constipation. These encapsulated egg turds you imagine would make this problem much more common, I think.
Furthermore, shit doesn't exactly do nothing as it slowly snakes through the intestines, you know. It gets broken down by gut bacteria and nutrients keep getting extracted from it all the way until you shit it out of your body. Sealing it up in an egg would prevent your body from continuing to absorb nutrients from it. And what about the gut microbes? Unless your body has some way of pasteurizing the shit, they're gonna keep breaking the shit down even if you encapsulated it into an egg shell. They release gases as they do this. These gases would build up and eventually cause the egg to explode. If this happens before you pushed it out of you then now you have jagged egg shell shards inside your rectum that might cut your rectum walls and cause an infection from all the shit coming in contact with this wound. Does this sound like fun to you?
So long story short, that's why this hasn't happened, and why it would never happen.
