In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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Wearing red increases attraction.
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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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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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