When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
28
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13