So, Murphy gets up out of bed and goes to the front door.
When he opens it, standing there is a drunken stranger, who is standing in the pouring rain, and is asking for a push.
“Not a chance”, says Murphy, “it is 3am! It’s the middle of the night!”
Murphy slams the door shut and goes back to bed.
“Who was that?” asked his wife.
“Just some drunk guy asking for a push”, Murphy answers.
“Did you help him?” she asks.
“No, I did not, it is 3am and what’s more it is pouring with rain 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. You should be ashamed of yourself!”
So Murphy does as he is told, gets dressed, 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 Murphy.
“Yes, please!” comes the reply from the dark.
Not being able to see the stranger, Murphy calls out “Where are you?”
“Over here, on the swings”, replied the drunk.
Image used under a Collective Commons License from: https://www.geograph.org.uk/photo/1226900