my dog doesn't sit down to take a dump.

Evolution says that traits that help a species survive are the ones that are kept, and thus are the ones that contribute to evolution.

When my dog goes outside and needs to take a dump, he doesn't find a nice comfy place in some bushes and make sure he has enough privacy.
Instead, he finds a patch of ground, does a weird little squat thing, and starts pumping chunks of poo out his bum, while walking around.

Now. My dog is a domesticated animal.
He doesn't have to worry about predators coming and killing him and eating his babies.
But wild animals... they do.

They always talk about those human things that weren't humans, but weren't apes, like Neandrathols or whatever.
They were supposedly hairy short people things that walked on two legs.
I'm sure they had predators, just like animals do. Them cheetahs and lions and 3-toed sloths can do some major damage.
Did "early humans" have to sit down to take a dump?
Cause im pretty sure that if i was a Puma, and i wanted a tasty Prehistoric People Dinner, i'd go after 'em while they were on the can.
Even if they didn't have porcelain back then, they could have dug holes in the ground next to a tree or something.
And what about girls peeing sitting down?
They must have been easy targets at the dawn of human civilization.
It just doesn't make sense that we'd win the "survival of the fittest" thing with having to sit down to poop.

i dunno man.