Laughter has positive effects, both physical and psychological, and is a healthy habit that should be put into practice every day . Sigmund Freud attributed to laughter the power to free the body of negative energy. This ability was scientifically demonstrated when it was discovered that the cerebral cortex releases negative electrical impulses a second after starting to laugh .

This is an informative book, it does not contain legal or technical information, it was created with the simple objective of entertaining, without further pretense.