People vary in how sensitive they are to tickling. Some people are only ticklish sometimes, while others are not ticklish at all. Tickling can be a fun game, a temporary annoyance, or a deeply ...
Inside a Berlin neuroscience lab one day last year, Subject 1 sat on a chair with their arms up and their bare toes pointed down. Hiding behind them, with full access to the soles of their feet, was ...