When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Historically, sweat has been an active ingredient in perfume and love potions.
309
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Men fall in love faster than women do.
32
40% of people who are rejected in romantic love slip into clinical depression.
72
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26