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
Historically, sweat has been an active ingredient in perfume and love potions.
309
Couples' personalities converge over time to make partners more and more similar.
235
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
99
Men who kiss their wives in the morning live five years longer than those who don't.
1k
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
40% of people who are rejected in romantic love slip into clinical depression.
72
The left ear is more responsive to words of love and emotion whispered into it than the right.
44