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
Wearing red increases attraction.
30
Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
Couples' personalities converge over time to make partners more and more similar.
235
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
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