Because they like being amoosed!
Poop.
A wise quack.
I herd.
They herd it through the bovine.
Disclaimer: I don't know how well this joke will work in English. What's yellow and lies in a pond? An excevator. You don't think this is funny? Neither does the operator.
Seriously, it is not a joke. I really want to know.
That was very amoosing