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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Men fall in love faster than women do.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Raj from the Big Bang Theory is married to Miss India.
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Two in five people in the world marry their first love.
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A man's beard grows fastest when he anticipates sex.
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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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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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