Couples' personalities converge over time to make partners more and more similar.
235
A man's beard grows fastest when he anticipates sex.
239
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
737
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