You burn 26 calories in a one minute kiss.
605
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Couples' personalities converge over time to make partners more and more similar.
235
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
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
Historically, sweat has been an active ingredient in perfume and love potions.
309