Johnny & Jenny

Two children, Jenny & Johnny are playing in the sandbox. Jenny pulls down
her pants, Johnny pointing out asks "What's that?", she replies "Don't know
Johnny." So Johnny pulls down his pants. Jenny points out "What's that?".
Johnny says "Don't know, let's go ask Mom."

They run inside and drop their pants and ask their mother 'what are these.'

"Jenny, you have the garage, and Johnny you have the car.", Mom explained.

"Oh, okay" the kids say.

They run outside and several minutes later Johnny comes back inside crying.

"What's wrong Johnny?"

"I tried parking my car in Jenny's garage and she ripped my back wheels off."