Why DON'T yellow cats poop?

A conversation between brothers, standing over the sandbox.

Tommy: Uh oh. It was open over night.
Danny: I think cats pooped in it.
Tommy: I don't see any poop.
Danny: But there are paw prints in the sand.
Tommy: Yeah, but I think it was a yellow cat. And yellow cats don't poop.
Danny: Oh. Okay. (and then he climbed in the sandbox.)

Because they both have to do with imaginary men who watch you in your house.

The other day I bought three things for the new house. I purchased two mezuzahs and a What the shit?! wall graphic.  Here are my issues with these purchases. Completely unpredictable and in no way asinine issues. A) I can't read Hebrew so I don't know which way to hang my mezuzahs. And B) I'm not sure where to put my creepy stalker man graphic to ensure that it gets noticed but it's not in your face that it's completely lame. 

Why does spellcheck flag mezuzah? I think it may be anti-semitic.