Porcupines have pricks on the outside.
The Rolling Stones say 'hey you, get off my cloud.' the Scotsman says 'hey MaCleod, get off my ewe.'
An egg gets laid before it cracks.
The pricks are in the inside of the Porsche.
With a police car, the pricks are on the inside
A. With a porcupine, the pricks are on the outside.
The porcupine has pricks on the outside.