Historically, sweat has been an active ingredient in perfume and love potions.
309
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
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
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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
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
Kissing an infection-free partner is good for your teeth!
141
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39