In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14