In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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When dragonflies mate, their tails form a love heart.
22
Wearing red increases attraction.
30
People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
278
Historically, sweat has been an active ingredient in perfume and love potions.
309
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Couples' personalities converge over time to make partners more and more similar.
235