Pucker up, its for science.
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
Via giphy.com
Dopamine can also make you lose your appetite and make it hard for you to sleep.
(Among the many other things it does for us).
Nickelodeon / Via nicksan.tumblr.com
Two thirds of people tilt their head to the right when they kiss.
German researcher Onur Güntürkün discovered this after spying on 224 couples kissing in public places in the United States, Germany and Turkey.
Via imgur.com
Kissing helps us work out if someone is a good match.
According to biological anthropologist Helen Fisher, we tend to prefer people with particular biological profiles. Trading saliva is one way to figure out if someone is a good fit.
Via do-we-still-exist.tumblr.com
