'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
The single biggest predictor of love is proximity.
30
Kissing an infection-free partner is good for your teeth!
141
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234