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
In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
27
Historically, sweat has been an active ingredient in perfume and love potions.
309
Couples' personalities converge over time to make partners more and more similar.
235
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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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29