A man and a woman, who have never met before, but are both married to other people, found themselves assigned to the same sleeping room on a transcontinental train. Though initially embarrassed and uneasy over sharing a room, they were both very tired and fell asleep quickly . . . he in the upper bunk and she in the lower.
At 1:00 AM, the man leaned over and gently woke 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 replied. "Just for tonight, let's pretend that we're married."
"Wow! That's a great idea!" he exclaimed.
"Good," she replied. "Get your own damn blanket!"
After a moment of silence,
he farted.
At 1:00 AM, the man leaned over and gently woke 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 replied. "Just for tonight, let's pretend that we're married."
"Wow! That's a great idea!" he exclaimed.
"Good," she replied. "Get your own damn blanket!"
After a moment of silence,
he farted.
JUST like an old married couple.
Once you're married you don't have to be on your best behavior anymore. 
