When you forget something you did due to
memory loss, or just because you forget things often, and you blame it on your
secretary (that you don't really have) because you're trying to
save face.
You see a
charge on your
bank statement and you call the company and yell at the phone operator and ask how they debited your account and they inform you that a debit could not have been made except by ME, and then you realize you were the one who debited
your card but had forgotten so you tell the operator that it 'must've been debited by your secretary'