Couples' personalities converge over time to make partners more and more similar.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
22
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
Sea otters hold hands while sleeping so they don’t drift away from each other.
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
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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