Your hair goes so far back in time, even cavemen saw it!
Your hairline goes as far back as the cavemen. Your forehead is also as deep as the cave.
What do you call it when a caveman does a fart?
A blast from the past!
What did the caveman say while seeing a reptile taking off?
Look at that dino-sour!
What do Cavemen poop in?
A Neander stall.