角□介绍□2>□□h2>□途风景与体验
But kissing □s no□ ju□t a ro□□ntic gestu□□—it □ls□ has s□ien□□fic be□efits.□When we□kiss,□our br□in□ □elease a cockt□i□ of □hemicals li□e oxytoc□n, □□p□m□ne,□and□serotonin,□□nown □s the "love□ho□mones.□ □he□e chemicals □an reduce st□ess, boost □ood□ and□create f□□lings□of attachment a□d bondi□g. Kissing also strengthe□□ □□r immune s□s□em□by exposing□u□ to a variety□of bacteria t□a□ can hel□ bu□ld im□uni□y.