cshapiro, huh? Who is “preaching to the choir?” Or do you not know what that phrase means? If I were preaching to the choir, then everyone would agree with me which is certainly not the case.
Take a tip from someone who already went to college. You do not need a “French joke” to make your presentation. For all you know, your professor will not like it and then you’ve lost him. You never know the complete background of those listening.