[Romantic Old Bird]

If he had, we would have a 21 day week, with at least 10 sundays.
S/He would also have undoubtedly invented cookie mountains and chocolate fountains, and there would be even more really peculiar creatures like the duck-billed platypus.

I suspect we would have found it even more impossible to scratch our backs, and that every time we sneezed we would automatically trump loudly.

S/He might also have decided to place our genitalia in the middle of our foreheads, and cause us to hiccough everytime we had a bad thought.