Actually, if you think about it, this is completely wrong. Smiling actually requires more muscles than not smiling, so if you were to smile, it would use up more energy and cause more wear and tear on more cells than any other reaction to a joke. So if you go through life without laughing at anything, you will use less energy and live longer. Furthermore, if you find a meme page on facebook that you like, you are more likely to visit it more often, and if you regularly spend your time looking at it, you will be more likely to stay up later, which reduces the amount of time you spend sleeping every night. Not only does that hurt your health, it also makes you more likely to drink caffeine, which can also be bad for your health. When you drink more and more caffeine every day, you eventually need more and more coffee to wake up every morning, so you will be more likely to drive to a coffee shop, which emits more fumes into the atmosphere. As the pollution level rises, it becomes harder and harder to breath clean air. So even though someone might think it would increase their lifespan to look at a funny meme instead of an unfunny meme, they would be right, because this image gave me cancer.