One in five long-term love relationships began with one or both partners being involved with others.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234
Couples' personalities converge over time to make partners more and more similar.
235
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Kissing an infection-free partner is good for your teeth!
141
Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
88