8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
Couples' personalities converge over time to make partners more and more similar.
235
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
One in five long-term love relationships began with one or both partners being involved with others.
177
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25