The average person spends more than 20, minutes of their life kissing, but we don't do that because it helps our immune system, do we? Kissing is hella fun, and arguably more intimate than sex itself. Without the feels, kisses might as well be a creative way of swapping saliva. So today, the day we celebrate kissing in all it's glory, what better way to honour the festivities with the most swoon-inducing smooches from the big screen? Did you really think this wouldn't be number one? Toby McGuire and Kirsten Dunst were either confused as to how kissing worked or they were onto something brilliant. Either way, their upside down kiss in Spiderman won't be forgotten easily and the science of how this kiss worked out so flawlessly will be studied for ages.