Tina wrote:
Yes, it's a part 135 joke, not a part 91 one, sent to me by a Jewish
friend.

THE FLIGHT

It was mealtime during a flight on El-Al. "Would you like dinner?"
the flight attendant asked Moishe, seated in front.
''What are my choices?" Moishe asked
"Yes or no," she replied.

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Well, I thought is was funny.

Well, that's because you are young. :-)
Take this authoritative source, please:

"Researchers find older folks don't get the joke"
http://news-info.wustl.edu/news/page/normal/9698.html

"It's no laughing matter that older adults have a tougher time
understanding basic jokes than do younger adults.

It's partially due to a cognitive decline associated with age, according to
Washington University in St. Louis researchers Wingyun Mak, a graduate
student in psychology in Arts & Sciences, and Brian Carpenter, Ph.D.,
Washington University associate professor of psychology."

Sadly, I didn't get the joke sentence at the end of the article. First my
hair goes, then my memory, and now this!