Couples' personalities converge over time to make partners more and more similar.
235
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
'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
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
The left ear is more responsive to words of love and emotion whispered into it than the right.
44
Speed dating was invented by a Rabbi in 1999.
45