Laughing makes us feel better and relaxed. Why? Neurotransmitters in the brain trigger electrical impulses to set off chemical reactions and increase the “feel good” hormone, endorphins. Endorphins are nature’s drug of choice for getting high. This morphine like chemical boost tolerance to pain, calms you during stress, and produces a feeling of euphoria and satisfaction. Hence, the “cleansing” experience you may experience after a good laugh.