Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
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.
25
Historically, sweat has been an active ingredient in perfume and love potions.
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'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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Two in five people in the world marry their first love.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13