Why are we Ticklish

The video explores the concept of tickling, dividing it into two phenomena: nysmesis and gargalesis. Nysmesis is the itchy sensation caused by light touch, common in mammals, while gargalesis involves a harder touch, leading to laughter and is unique to primates. The video suggests that gargalesis may have evolved as a mechanism for young primates to learn self-defense. Tickling induces positive facial expressions, encouraging interaction and learning. The video concludes by framing tickling as a playful way to teach life skills.

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