When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Parents receive 1 out of every 5 Valentines.
20
A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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Men fall in love faster than women do.
32
When dragonflies mate, their tails form a love heart.
22
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
41
40% of people who are rejected in romantic love slip into clinical depression.
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