Three women, while traveling in a train, are discussing different types of pain.

The first woman says, "There is no pain like when you suffer a fracture".

The second woman says, "That's nothing. Post-surgical pain is the worst".

The third woman says, "I disagree. Pain during childbirth is the severest".

An old man who is resting up on the top bunk overhears this conversation and interrupts them.

"I don't think you three have ever experienced a swift kick to the balls".