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Is there a joke that shouldn't be funny to you, but is, and continues to be funny longer than it should be?
(hexbear.net)
I don't even remember the specific thread, but one time I read about an updated zoomer-era version of Full Metal Jacket where the main character was named Private Jokerfied. 
I still find that funny, smile and chuckle and all, and I can't make it not-funny so I just roll with it. 
I'll never get tired of asking my friends "Do you feel a sharp pain?" when they ask where something is.
If you don't know the rest: When they say "No." you tell them,"It's not up your ass, then!"
Unfortunately, it's gone on so long now, no one falls for it anymore.
Hmm, not as subtle, and lacks the "gotcha", but it would work.
I need to remember this one.