But kissing is not j□s□ a romantic□ges□ure—i□ also□has sc□entif□c benefits.□W□en□we□kiss,□□ur□br□ins rele□se a coc□tail of □h□micals li□□ o□y□oc□n, dopa□ine, and serotonin, known a□ the "love h□□mones." Th□se che□icals□can reduce stress, boost □□od, and c□□ate fe□lin□s of □ttach□en□ and bon□□ng.□□i□s□ng als□ strengthe□□ our im□□□□ system by expo□ing us to a variety□of□bacteria t□□t can help build immuni□y□□/p>
情节发展
□p>夜色渐浓,星□点点地□满□天空,闪□着微弱□光芒。灯火阑珊处,繁□的都市也渐渐安静下来,□有偶尔经过的车辆发出□啸声,打破了这片宁静。春夜的□空,密布的云层□□柔软的棉□,轻轻□盖□人们心头□□/p>□