: Recent research suggests that if both great apes and humans kiss, their last shared ancestor —living roughly 21 million years ago—likely did as well.
: Kissing triggers the release of oxytocin, dopamine, and serotonin , which promote feelings of euphoria, affection, and bonding. It also lowers cortisol, the primary stress hormone. Kissing on the Mouth
When you kiss, your body initiates a complex chemical reaction that impacts both your physical and mental state. : Recent research suggests that if both great
: A deep kiss engages up to 24 facial muscles , which can help tone the face and neck. History and Cultural Context which promote feelings of euphoria
: In ancient Persia and Rome, a kiss on the mouth was often used between men of equal rank to signify status and equality.