Unit three, laughter is the best medicine. Do you often love with friends? Do you get? go? I jokes. If you do, that is great. Because just as the saying goes, laughter is the best medicine. People start laughing from a Young age. At around three months old, babies learn love. Even babies that cannot see or here can laugh. Laughter is a natural part of life, but why is this so important? First of all, laughter is good for our body. When we laugh, our body takes in more oxygen. Every part of our body means oxygen to work well. Laughter also makes our body work out. Our heart, stomach and even our shoulder work hard when we laugh, but after we laugh, our muscles feel more relaxed. A good lab can help you feel relaxed for up to forty five minutes over time. Laughter helps our body to get stronger, fight off more diseases and even create special chemicals to help us feel less pain. Laughter also has many benefits for our mood. When we laugh, IT makes us feel less stressed or anxious, and things will not seem so bad. Laughing also causes our brain to release chemicals that make us feel calm and happy. Scientists even think that smiling often is enough to increase these chemicals in our brain. But IT is not always easy to laugh on our own. We are thirty times more likely to laugh when we are around others. According to some scientists, laughter can show others that we want to be close to them. Monkeys clean one another fur to show friendship, but people laugh so that others will know that they are being friendly. Some people even join laughing groups, although they force themselves to laugh at first. After hearing other people laugh, their laughter becomes real. Before long, the whole group of people is loving hard. The next time you feel unhappy, try thinking about something funny. Although you might not want to love when you are sad, doing so can make you feel Better.