A man and his wife are awakened at 3 o'clock in the morning by a loud pounding on the door.
The man gets up and goes to the door where a drunken stranger standing in a pouring down rain is asking for a push. "Not a chance" says the husband - "It's three o'clock in the morning!"
He slams the door and returns to bed. "Who was it?" asks his wife. "Just a drunken stranger asking for a push" he answers. "Did you help him?" she asks. "No, I didn't - it's three in the morning and raining like hell out there!"
"Well you've got a short memory" says his wife. "Can't you remember about three months ago when we broke down on the freeway and those two guys helped us? I think you should help him."
The man does as he is told and gets dressed and goes out into the pounding rain and calls out into the dark. "Hello - are you still there?"
"Yes," comes the answer. "Do you still want a push?" calls out the husband.
"Yes, please!" comes the reply from the dark.
"Where are you?" asks the husband.
"Over here on the swing" the drunk replies.