A duck is a carbon-based life form while a curling iron is an inanimate appliance
One says, "Hey, you, get off of my cloud!" The other says, "Hey, MacLeod, get off of my ewe!
An egg can stay in the cup longer
People sometimes get upset if you shoot a duck. The duck is much less greasy. BUT MOST IMPORTANT Nobody ever complains about a duck's bill.
A wise quack.
He couldn't stop dropping the base!
An algorithm.
Because he missed a split-end on a curl.
A pedal physician in the fetal position.