Because they don't want to give away their presence.
or
Because she would have to move into a smaller house.
or
They can't find the key, and they never know when to come in.
or
He got caught peeping on a test.
or
If Trump gets Alzheimers his IQ will go up.
or
Just one, but he/she will spend hours checking for technical problems.
or
"Trike or Treat"?
or
The tame way, unique up on it!
or
Just one, but he/she will spend hours checking for technical problems.
or