It's Not What You Think

An old woman, a young woman, and Englishman, and an Irishman are travelling in the compartment of a train together across the British countryside. Each of the four of them is ignoring the other three.

Suddenly, the train enters a tunnel, and the compartment is thrown into pitch blackness. Out of the darkness comes the sound of a kiss, then the sound of a slap.

The train leaves the tunnel, and the travellers act as though nothing happened.

The old woman, however, is thinking to herself, "Look at that young woman sitting there next to me, acting as if nothing happened. I KNOW the Englishman kissed her."

The young woman is thinking to herself, "Why would an Irishman kiss an old lady?"

The Englishman is thinking to himself, "I didn't to anything! Why'd I get MY face slapped?"