When I was a teen, my brother answered the doorbell one evening when we were all
laying around watching TV.
He came back into the living room and said, "Hey, Dad, there's a MISSIONARY at the door".
And my Dad shot back, "Great ask him in. I'd like to have him explain his POSITION"!
Hilarity ensued, and my blushing little brother told the young Mormon it would be
better for him if he just went on to the next house!