You burn 26 calories in a one minute kiss.
605
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
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Parents receive 1 out of every 5 Valentines.
20
Couples' personalities converge over time to make partners more and more similar.
235
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
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
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10