One in five long-term love relationships began with one or both partners being involved with others.
177
Wearing red increases attraction.
30
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
40% of people who are rejected in romantic love slip into clinical depression.
72
Couples' personalities converge over time to make partners more and more similar.
235
People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
278
Speed dating was invented by a Rabbi in 1999.
45
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104