If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
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.
27
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
Historically, sweat has been an active ingredient in perfume and love potions.
309
In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
16
When dragonflies mate, their tails form a love heart.
22