Because they chew balls.
A hot dog
It swags its tail.
I must throw that doggie out the window!"!
I chews you
A guy laughing his balls off.
Their balls are only for decoration.
Because they have a quidditch.
They have a lot of moo/neigh.
Because he was pain in the neck!
Peking duck. (it came to mind over dinner... I thought I would share the pain with everyone)