because seven ate nine.
Because they're paid to.
A nun with a javelin in her throat. (The only joke I can ever recall when asked for one. Told to me by my art teacher in Grade 11. Needless to say, he was my favourite teacher)
How to surrender in twenty-seven different languages.
How can you make seven even? Take away the letter S.
Because 7 ate 9.
he relished it
Katie Keurig. (I know the setup might need some work but I just like the punchline I made up.)