A man and his wife are woken at 3 o'clock in the morning by a loud knocking on the door. The man gets up and goes to the door where a stranger is standing in the pouring rain. "Excuse me mate", he asks, "I'm sorry to disturb you, but I don't suppose you could help me out - I need a push! "Not a chance," says the husband, "it's 3 o'clock in the morning!" He slams the door and returns to bed. "Who was that?" asked his wife. "Just some guy asking for a push," he answers. "Did you help him?" she asks. "No, I did not, it is 3 o'clock in the morning and it is pouring out there!" "Well, you have a short memory," says his wife. "Can't you remember, about three months ago when we broke down, and those two guys helped us? I think you should help him, and you should be ashamed of yourself!" The man does as he is told, puts a coat over his dressing gown, and goes out into the pounding rain. He calls out into the dark, "Hello, are you still there?" "Yes" comes back the answer. "Do you still need 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!" he replies.