'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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Parents receive 1 out of every 5 Valentines.
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Couples' personalities converge over time to make partners more and more similar.
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You burn 26 calories in a one minute kiss.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
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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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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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