Because they're both cauldron
A boat.
I've never had a garbanzo pea on my face.
Didn't you tell me to put out a stop swine
How would you tell them apart from goldfish
They all dress like Dobby.
Why was Harry Potter kicked out of Hogwarts? He was caught playing with his broomstick.
A flat mate.
They are always willing to stick their neck out for you.