Laughing is a universal human trait found in a wide variety of civilizations, as well as in animals such as monkeys and dogs. Smiling is a communication gesture between human species and even between different species (as when you smile at your pet), and it promotes approximation.
Around the age of three months, a newborn begins to smile spontaneously. However, for the mother, identification of the sound of a laugh begins far earlier, while still inside the uterus. Thus, we were born knowing that laughter is a sign of happiness and tranquility.
And that is a socially significant role that may have influenced species evolution—when we laugh, we communicate that we have arrived in peace, that we are nice, and that everything is OK. It instills a positive mood in observers, which enhances social interaction and cooperation, particularly in large groups. It is more contextually appropriate, and it also encourages a sexual approach.
When we laugh at something we find hilarious, it indicates that earlier experimentation occurred. That is, you have witnessed or experienced a similar scenario previously and your brain retains the memory.
This is why you may find something amusing, but your friend may not. Additionally, laughter is a social issue: when you are part of a group that laughs at something, even though you do not find it amusing, you may find yourself laughing to feel included.
Laughter is beneficial to your health! However, the advantage of a good laugh comes first: it is a reflection of enjoyment, such as when something pleasant and amusing occurs during the day. This type of event stimulates the body to release feel-good chemicals such as adrenaline, serotonin, and dopamine. These chemicals, for example, promote a sense of well-being, promote relaxation, and fend off negative emotions.
Laughter has the power to activate a wide range of muscles in the body. As a general rule, there are 36 muscles on the face; eleven of them are activated when we laugh, most of them in the area around the eyes and mouth. Furthermore, the healthy appearance of the face is enhanced by the constant movement of these muscles.
Tears are produced when the tear glands in the face are triggered by laughter. When you laugh too hard, it’s normal to cry. Anyone who has ever had a little pee leak out in the middle of a laugh, which is more prevalent in children since they don’t yet have full control over their body’s motor processes. Squirming during a state of euphoria, whether from rage or tears, puts pressure on the bladder, causing the person to urinate.
Then there is the inadvertent laughter that occurs while you’re feeling down. A severe contraction of the facial muscles in a movement that resembles laughter might be caused by strong feelings of grief or even wrath.