Another thing I wonder how cavemen went without is vacuum cleaners. Of course, they didn't have carpet. I wonder if they used animal skins for rugs or just wore them as clothing. If the local mammoth ended up on the cave floor, then how did Mrs. Og keep it clean without a Hoover to such up all that dirt?
By the way, I used to go around telling people that famed federal lawman J. Edgar Hoover invented the Hoover vacuum. Some of the folks were really impressed he was that talented. That's why they named Hoover dam after him.
Probably just as well I don't teach history.