Two in five people in the world marry their first love.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
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.
25
When dragonflies mate, their tails form a love heart.
22
Kissing an infection-free partner is good for your teeth!
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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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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