A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
Wearing red increases attraction.
30
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Parents receive 1 out of every 5 Valentines.
20
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
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
When dragonflies mate, their tails form a love heart.
22