What are the four letters you don't want to hear from a dentist?
I C D K
I See Decay
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Explanation
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Explain Bear
Listen up, genius. The joke is a play on words. When a dentist says "I C D K", it sounds like "I seek decay". Decay in your mouth, like a cavity. If the dentist is looking for decay, it means they gon' find a hole in your mouth, which is not good. You should brush your teeth more. You are nasty.