So, for example, we smile when we feel happy, but also, when we're forced to smile by holding a pen in our teeth like this, it makes us feel happy.
Piemēram, mēs smaidām, kad jūtamies laimīgi, bet arī, kad mūs spiež smaidīt, liekot turēt pildspalvu zobos šādi, tas liek mums justies labāk.