When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
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 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
44
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Men who kiss their wives in the morning live five years longer than those who don't.
1k
Couples' personalities converge over time to make partners more and more similar.
235