初试身手□/□2>
□p□But kissing is not j□st a romant□c gestu□e—it also has □cientific be□□□i□s. □□en□we□kiss, our brains□release a cocktail □□□ch□mic□□s□like□oxyt□cin□□□op□mine,□and□sero□oni□, kno□n□a□ th□ "lo□e□hormon□s." Th□se□chemi□als can□reduce s□□ess, boost mood, a□d create feelings of attachme□t and bonding. Ki□□ing □ls□ st□□ngthens □ur imm□ne□□yste□ by exposi□g us t□ a variety of bacte□i□□□hat can h□l□ bui□□ immu□it□.