The Horse's Advantage
If they don't work out you can sell them.
They don't come with in-laws.
You don't have to worry about your children looking like them.
You never have to iron their saddle pads.
If you get too fat for one you can shop for a bigger one.
They smell good when they sweat.
You can repair their "clothes" with duct tape.
It's possible to keep them from "jumping the fence".
You can force them to stay in good physical condition...with a whip if necessary.
They don't want their turn at the computer.
They turn white with age, but not bald.
They learn to accept restraint. They don't care what you look like, as long as you have a carrot.