□p>But ki□sing □s not□jus□ □ romantic gest□re—i□ also h□s sc□ent□fic b□nefits. □hen we k□ss, o□r brains r□lea□e a c□cktail of chemicals□like □xytocin,□dopamine, and serotonin,□known as the "l□ve hormones.□ These chemicals□ca□ □edu□e□stress, bo□st □□od, and creat□ feelings of a□□achmen□ and bonding. Kissing also stre□□th□□s ou□ imm□n□□□ystem b□ □xposing□us□to a variet□ of bacteria that ca□□help build immu□i□y.