<□□>勇气与牺牲□□h2>
<□>But kissi□g i□ not □ust a roman□ic gesture—it also has□s□i□ntific bene□i□s. When we□kiss, our br□i□s rel□ase a cocktail of chemical□ like o□□tocin, dopamin□, and□sero□□nin, know□ as □he□"lov□ hormones." T□ese chemi□als □an □ed□ce stress, □oost moo□,□□nd c□eate fe□l□□gs□of□a□t□chment and b□□din□. Kissing also str□ngthens □□□ immu□e system□b□ exp□sing □s □o □ □□ri□t□ of bacteria th□t □an help build immun□ty.