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
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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
A man's beard grows fastest when he anticipates sex.
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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
Speed dating was invented by a Rabbi in 1999.
45