Why are we Ticklish?

The video explores the concept of tickling, dividing it into two types: nysmesis and gargalesis. Nysmesis is the itchy sensation caused by light touches, while gargalesis involves a mix of pain and pleasure from harder touches, primarily affecting primates. The video suggests that gargalesis may serve an evolutionary purpose, helping young primates learn self-defense. Tickling induces laughter and positive expressions, encouraging interaction and learning.

What new insight or understanding did you gain from this video?