In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
Raj from the Big Bang Theory is married to Miss India.
11
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Kissing an infection-free partner is good for your teeth!
141
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Couples' personalities converge over time to make partners more and more similar.
235
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.
464
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14