When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Wearing red increases attraction.
30
When dragonflies mate, their tails form a love heart.
22
A man's beard grows fastest when he anticipates sex.
239
Men who kiss their wives in the morning live five years longer than those who don't.
1k
The single biggest predictor of love is proximity.
30
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
Historically, sweat has been an active ingredient in perfume and love potions.
309