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But ki□s□n□ is □ot j□st □ romantic ge□ture—it □l□o has sci□ntific □en□f□ts□□W□e□ we ki□s,□our b□□ins□□ele□se □ cockt□il of chem□cals□like□oxyto□□□, dopam□ne,□and serotonin, known as the □□□v□ hormones." The□e chem□cals can r□du□e stress, boost mood, □nd□create feel□ngs of attachment and□bondi□g. Kissing also str□ngthens ou□ immune □yste□ by □□posing □s □o a variety of□bacteria that □an help □uild □mmunit□.□/□>□与观□之间的默契