Charlie was visiting an old friend and his wife for dinner. When the
time came to leave, his car wouldn't start, and it was too late to call
the local service station.
The husband urged Charlie to stay over. There was no spare bed in the
house; there wasn't even a sofa. So Charlie would have to sleep with the
husband and wife.
No sooner had the husband fallen asleep when the wife tapped Charlie on
the shoulder and motioned for him to come over to her.
"I couldn't do that," he whispered. "Your husband is my best friend!"