In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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Parents receive 1 out of every 5 Valentines.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Kissing an infection-free partner is good for your teeth!
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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
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
One in five long-term love relationships began with one or both partners being involved with others.
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