How Many Muscles Does It Take to Kiss?
The number of muscles used depends on the kiss; a simple pucker can take only two muscles while a full French kiss requires all 34 muscles of the face. The most significant muscle used in kissing is the one that puckers the lips, known as the orbicularis oris muscle.
In addition to the muscles of the face, scientists have observed that up to 112 additional postural muscles are used during a kiss. Neuroscientists have observed that a kiss also requires coordination of spatial and visual information and involvement of the ventral intraparietal region of the brain in order to plant the kiss on the lips and avoid the nose.