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
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Historically, sweat has been an active ingredient in perfume and love potions.
309
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!)
278
40% of people who are rejected in romantic love slip into clinical depression.
72
Men who kiss their wives in the morning live five years longer than those who don't.
1k
Couples' personalities converge over time to make partners more and more similar.
235
'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