We are not monkeys - look at your ass, do you see a tail? No, we are apes. Chimpanzees, gorillas, orangutans, us. Apes.
Granted, to most folks it's probably too fine of a distinction to matter, and if I wasn't a physical anthropologist I probably wouldn't care. I certainly agree with the sentiment that I'm guessing is meant to be conveyed - we're primates, we do stupid primate things. "Apes" apparently doesn't have the resonance "monkeys" does, though, so monkeys it is.
Or monkey's, if it's a really bad day.