When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
633
When dragonflies mate, their tails form a love heart.
22
Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
88
Historically, sweat has been an active ingredient in perfume and love potions.
309
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
Couples' personalities converge over time to make partners more and more similar.
235