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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Historically, sweat has been an active ingredient in perfume and love potions.
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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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Sea otters hold hands while sleeping so they don’t drift away from each other.
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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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The left ear is more responsive to words of love and emotion whispered into it than the right.
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One in five long-term love relationships began with one or both partners being involved with others.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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