Couples' personalities converge over time to make partners more and more similar.
235
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Historically, sweat has been an active ingredient in perfume and love potions.
309
Kissing an infection-free partner is good for your teeth!
141
Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
22
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104