□p>But □issing is n□□ j□□t□a roma□tic□□estu□e—it also h□s s□ie□tif□□ be□e□its□ When we □iss□ our brains r□leas□ a cocktail □f chemicals like oxyt□cin□ □opamine, and serotonin,□known a□□□he □l□ve □□rmo□es." □hes□ □hemicals□ca□ □edu□e □tress, b□ost□mo□d, □nd create□feelings of att□chment and bondin□. Kissing also stre□gthe□s our imm□□e□□ystem□by exp□□ing us t□ □□variety of bacteria that ca□□help□□uild i□munity.