We don't need a sense of humor to laugh. Even when unhappy, behaving or acting happy will bring the mind to a state of happiness.
Bring laughter to the body and the mind will soon follow. And it's free. According to Laughter Yoga International, an extended session of laughing provides a solid diaphragm and abdominal workout; it's also said to diminish stress, depression, blood pressure, arthritis, and asthma, and boost the lungs and immune system.
