You burn 26 calories in a one minute kiss.
605
Couples' personalities converge over time to make partners more and more similar.
235
Wearing red increases attraction.
30
In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
-2
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234