Rick and Morty in “Unfinished Business”

I always knew your hormones would cause a world war between humans and cannibalistic horse people. I just didn't know it would be like this.

I can't change my nature.

What are you, a scorpion in a Navajo fable? Everyone can change their nature, Morty. It's what defines our species. Look at Iron Man. That actor was an animal in the '90s! Literally waking up in bushes! His agent had to catch him with a butterfly net.