Historically, sweat has been an active ingredient in perfume and love potions.
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!)
Two in five people in the world marry their first love.
'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.
A man's beard grows fastest when he anticipates sex.
Couples' personalities converge over time to make partners more and more similar.
The typical person spends about 600 hours having sex between the ages of 20 and 70.
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.