Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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.
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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.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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You burn 26 calories in a one minute kiss.
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Parents receive 1 out of every 5 Valentines.
20
Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
22