UFF

The cat refuses to kneel, and is promptly fried by a bolt of lightning in front of a group of cat lovers.

The cat lovers caress the singed, mangled body of the cat.

After mourning the cat, the cat lovers, angry at god, unleash the power of atheism!

(Ey, posting images doesn't count!)

However the god cannot abide to the situation and smites them by... tickling.

The cat-lovers-turned-atheists fell quickly to the smite, but as the tickling went by...

...Satan suddenly appeared and set everyone on fire!

And then everyone died. Satan and God had an argument, and both sides were tied.

The world was remade with people having butts as heads and vice versa as result.

The scientists proceeded to become stupid and switch their butts, that were heads, for heads, that were butts.

This had a devastating effect on sexuality, as people found headbutts more attractive, therefore the masses kept getting surgery to fit in, a few thousand years later, humanity looked like what it does now.