Men who kiss their wives in the morning live five years longer than those who don't.
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Speed dating was invented by a Rabbi in 1999.
45
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
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
Historically, sweat has been an active ingredient in perfume and love potions.
309
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
40% of people who are rejected in romantic love slip into clinical depression.
72
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4