The single biggest predictor of love is proximity.
30
Historically, sweat has been an active ingredient in perfume and love potions.
309
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
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
Parents receive 1 out of every 5 Valentines.
20
Men fall in love faster than women do.
32
When dragonflies mate, their tails form a love heart.
22