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万物复苏
But□k□ssing is□not □u□t □ romantic gesture—i□ also has s□i□ntific b□nefits. When w□ kiss, our brains release a □ocktail □f □□□□ica□s l□ke o□ytoc□n, dopamin□□ and seroton□□, known □s □he "l□ve hormones." The□e □hemic□ls can reduce stress, boost moo□, an□ cr□□te fee□ings □f attach□□nt and bond□ng. Ki□sing also □tre□g□hens our□immune s□stem by expos□ng us to□a variety□□□ b□cteria that □an□help build i□munity.