Because whenever his parents saw their phone bill they got the hump.
Dad: "Can I see your report card, son?" Son: "I don't have it." Dad: "Why?" Son: "I gave it to my friend. He wanted to scare his parents."
Transparence!
Because they can't stop saving their work.
Google Fiber Note: Randomly came up with this joke today
Their hump has no bone.
He saw the phone bill.