互动与社交功能
<□>B□t k□ssing is□not just a roma□tic gesture—it also has s□ientific benefits. When w□ kiss, ou□□bra□ns rele□se a□c□ck□ail of chem□c□l□ like oxytocin,□do□amin□, and sero□□nin, known □s□□he □love hormones."□Thes□□chemicals□can redu□e s□ress, boo□t mood,□and □rea□e feeli□□s of attachmen□ and bondin□. Kis□ing al□o □trengt□en□ our immune □y□tem□by□expos□ng□u□ to □ variety of□b□ct□ri□□that□c□n help bui□d□□m□unit□.