A gentleman was sitting quietly in a first-class compartment. Two ladies boarded. One of them noticed the open window and shut it before taking her seat.
"Open it again," said the second lady. "I'll die of suffocation without fresh air."
"I won't," retorted the first. "I'll die of cold if it's open."
A quarrel ensued and continued until the gentleman intervened:
"Let's keep the window shut until this lady dies of suffocation," he suggested calmly. "Then we can open it until this lady dies of cold. After that, it will be nice and quiet in here again."