They're robots in da skies.
A transformer.
Have you ever blown a Transformer?
A: A Rolling Stone says "hey you get off of my cloud!" while a Scotsman says "Hey McLeod get off of my ewe!"
Thunderstorms
So you can make dinner and get head at the same time.
They cut off their heads using a Gweilotine.
A gender bender Bender fender bender.
Yours tin-sincerely.
Because it's in da-skies!