An elderly doctor and a Presbyterian minister were seated next to each other on a plane.

The plane was delayed at the start due to some technical problems. Just after taking off, the pilot offered his apologies to the passengers and announced that a round of free drinks would be served.

When the charming air hostess came around with the trolley, the doctor ordered a gin and tonic for himself. The hostess then asked the minister whether he wanted anything.

He replied, "Oh no! Thank you. I would rather commit adultery than drink alcohol.”

The elderly doctor promptly handed back his gin and tonic to the air hostess saying, "Madam, I did not know there was a choice."