The single biggest predictor of love is proximity.
30
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
You burn 26 calories in a one minute kiss.
605
Kissing an infection-free partner is good for your teeth!
141
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
One in five long-term love relationships began with one or both partners being involved with others.
177
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26