Parents receive 1 out of every 5 Valentines.
20
Men fall in love faster than women do.
32
Men who kiss their wives in the morning live five years longer than those who don't.
1k
A man's beard grows fastest when he anticipates sex.
239
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Couples' personalities converge over time to make partners more and more similar.
235
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
In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
16