A man and a woman, who have never met before, find themselves assigned to the same sleeping room on a transcontinental train.
Though initially embarrassed and uneasy over sharing a room, the two are tired and fall asleep quickly...he in the upper bunk and she in the lower.
At 1:00 AM, he leans over and gently wakes the woman saying, "Ma'am, I'm sorry to bother you, but would you be willing to reach into the closet to get me a second blanket? I'm awfully cold."
"I have a better idea," she replies. "Just for tonight, let's pretend that we're married."
"Wow! That's a great idea!!" he exclaims.
"Good," she replies. "Get your own damn blanket!"
After a moment of silence, he farted.