'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
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234
One in five long-term love relationships began with one or both partners being involved with others.
177
Two in five people in the world marry their first love.
270
You burn 26 calories in a one minute kiss.
605
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212