8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
27
Wearing red increases attraction.
30
Couples' personalities converge over time to make partners more and more similar.
235