Parents receive 1 out of every 5 Valentines.
20
Speed dating was invented by a Rabbi in 1999.
45
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
Couples' personalities converge over time to make partners more and more similar.
235
Men who kiss their wives in the morning live five years longer than those who don't.
1k
One in five long-term love relationships began with one or both partners being involved with others.
177
A man's beard grows fastest when he anticipates sex.
239
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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