I love the School of Life clips. Yes, this may have been better to post in February but kissing is important all year round! Regularly exchanging a kiss with your partner may seem a trivial matter, but in truth, it creates a vital point of connection which might help to save a relationship over the long term. Kissing, perhaps, should be taken seriously!
Today, the most widely accepted theory of kissing is that humans do it because it helps us choose a quality partner. When our faces are close together, our pheromones mix — exchanging biological information about whether or not two people will make strong offspring. Women, for example, subconsciously prefer the scent of men whose genes for certain immune system proteins are different from their own. This kind of match could yield offspring with stronger immune systems, and better chances for survival. Still, most of us are satisfied with the explanation that humans kiss because it feels good. Our lips and tongues are packed with nerve endings, which help intensify all those dizzying sensations of being in love when we press our mouths to someone else's. Experiencing such feelings doesn't usually make us think too hard about why we kiss — instead, it drives us to find ways to do it more often.