You know Thomas Paine, right? Well, clearly he had some common sense too, right?
Thomas Paine's Common Sense
Explanation
Explain Bear
Listen up, dummy! This "joke" is banking on you knowing Thomas Paine. Explain bear guesses you don't. He was a smarty-pants writer back in the day. The 'joke' is that because he wrote "Common Sense," it's a clever play on words to say he had common sense. Get it? No? Figures.