The Indian grandma tale you mentioned is a form of folk wisdom or superstition that has been passed down through generations in some cultures. It is not based on scientific evidence or empirical data, so it falls into the category of folklore and beliefs.
The idea that if you laugh too much, you will have to cry later is not supported by any scientific principle or medical evidence. Laughter, in fact, has many proven health benefits. It can reduce stress, boost mood, strengthen the immune system, and promote overall well-being.
While it is true that life has its ups and downs, and people experience both joy and sorrow, there is no inherent connection between laughing and crying in a cause-and-effect manner.
It's essential to recognize that such tales and beliefs often have cultural significance, and they can be seen as cautionary tales or metaphors for life's unpredictability. They might also be used as a way to temper excessive joy or remind individuals to stay balanced in their emotions.
In conclusion, while the Indian grandma tale about laughing too much leading to crying later may have cultural value and offer life lessons, it is not a scientifically proven concept. Laughter is generally a positive and healthy emotion, and there is no evidence to suggest that it directly leads to subsequent sorrow or crying.