B□t k□□sing □s not □□s□□a romant□□ gesture—□t□□lso □as scienti□ic be□□fits. When we k□s□, our b□ains release a cockt□□l o□ ch□micals like□o□ytoc□n, □op□mine,□a□□ s□□o□oni□□ kno□n□□s□the □love□ho□mones." Th□se□chemica□s can reduce s□ress,□b□ost mood, and□cr□ate feelings of attachment and □ond□n□. Ki□sin□ al□o strength□ns our□im□une syste□ by exposing□us to □ variety of□bac□eria that can help build □mmunity.
2012年□被誉为“喜事连连”的一年,许多令□振奋的□□相继发生,让世界充满了欢乐□希□。这一年,不仅记□了众多历史性时□□还见证了□类的□步和团□,让我们一起□顾这些令人难□的时刻。<□p>□