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 is the primary sensation associated with nysmesis?

• A light, itchy feeling

• A feeling of warmth

• A strong urge to laugh

• A mix of pain and pleasure

Which type of tickling is unique to primates?

• Neither nysmesis nor gargolesis

• Both nysmesis and gargolesis

• Gargolesis

• Nysmesis

What is a characteristic reaction of primates to gargolesis?

• A quiet hum

• A sudden jump

• A noiseless pant

• A loud scream

What is one theory about the evolutionary purpose of gargolesis?

• To encourage social bonding

• To enhance sensory perception

• To improve hunting skills

• To help primates learn to defend themselves

Why might laughter and smiling during tickling be evolutionarily beneficial?

• They discourage further tickling

• They signal enjoyment and encourage more tickling

• They are a sign of submission

• They help in identifying threats