In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Kissing an infection-free partner is good for your teeth!
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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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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