BrainCraft

Why Are We Ticklish?

Our reaction to be tickled may be nature's way of encouraging self defence training from an early age.

Why Are We Ticklish?

3m 28s

Our reaction to be tickled may be nature's way of encouraging self defence training from an early age.

    Similar Shows

    WETA Passport

    Stream tens of thousands of hours of your PBS and local favorites with WETA Passport whenever and wherever you want. Catch up on a single episode or binge-watch full seasons before they air on TV.