Psychologists leave no stone unturned, and have researched what kissing is all about. Surprise surprise one study has found than levels of the stress hormone cortisol are reduced while the friendliness hormone oxytocin is enhanced. Perhaps, more interestingly, a different study found that the stimulation sparked off by kissing was not as good as the buzz from a box of chocolates (apparently these findings are supported by Baywatch Babe Pamela Anderson who sad that chocolate is better than sex). So, what to do for Valentines Day – ask for kisses and chocolate.