电机大□的挑战
□p□But □i□s□ng □s □ot□□ust a rom□ntic gesture—it also has scie□t□fic ben□f□ts. When we□ki□s,□our brains releas□ a□cocktail o□□□hemicals □ik□ □xytocin, do□a□in□, and s□roton□n, known a□ th□□□l□□e hor□on□s." These□ch□micals□can□reduc□ stress□□boost mood, □nd □reate feelings of a□ta□□men□ a□d bo□ding□ Ki□sing also strengthe□s our□immune system by exposing us to □ vari□ty of bacte□ia that c□□□help b□□ld im□u□ity.