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But kissing is not just a □omantic gesture—□t als□□ha□ sc□ent□fic benefits□ When we kiss□ our brains relea□e a□cock□□il o□ c□e□icals li□□ o□ytocin, dopam□ne, □nd serotonin, kn□wn □s the "lo□e hormones.□ These chemic□ls □an reduce st□es□,□b□ost□mo□d, and cre□te feeli□gs of at□□chment a□d bonding. □issing also st□eng□hen□ our□immun□ syste□ by exposi□g□us to a varie□y □f□bac□eria that□can □e□p build i□munity.□/p>□