The single biggest predictor of love is proximity.
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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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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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Historically, sweat has been an active ingredient in perfume and love potions.
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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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A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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