'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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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
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 dragonflies mate, their tails form a love heart.
22
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
41
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34