Did she stick her tongue out? Have you ever stopped to wonder why people do this? It’s not just children who do this.

Sticking your tongue out may be involuntary ... usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging ...

Did she hold her breath or knit her eyebrows? Did she stick her tongue out? Have you ever stopped to wonder why people do this? It’s not just children who do this. Grown-ups bite their lips ...