Because you're not supposed to feed them people food.
A police dog in disguise.
Linda McCartney
Because they use the Theory of Relativity to find a partner.
You ask them to pronounce unionize.
A three-corpse meal.
You should stop by later. The missus and I are having people for dinner.
He lost hijab.
He wanted rich milk!
Food.
Jerky.
All it does is make you tired and stressed out and anxious and nevermind I get it.
Because he higher and higher. (I translated the joke from Dutch, and yeah it's supposed to not make any sense, it just sounds funny, in Dutch at least. :-$)