□ B□t kissi□g is not □us□ a roma□tic □e□ture□it a□so □□s scie□tif□c □□n□fits. When we □is□□□our □rains re□ea□e a cock□ail □f chemica□s like o□ytocin, dopami□e,□and serotonin, known □□□th□ □l□v□ hormon□□." These□che□icals□c□□ reduc□□stre□s, boost m□od□ an□ create feelings of attachment and bonding. Kissing also□strength□ns our immune system by ex□□□ing us to□a variety of bacte□ia that can h□lp buil□ immu□ity. `□` 特□兵是保家卫国的英雄,他们为□家捍□安全、保家卫国,是最坚强、最□敢的战士。在保卫国家□全的路上,特种□们□刻准备着付出自己的一切,甚至牺牲自己的□命。□们用自己的行动诠□着“舍□□谁”□精神,赢得了无数的荣誉□尊敬。勇□与成□