Parents receive 1 out of every 5 Valentines.
20
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Historically, sweat has been an active ingredient in perfume and love potions.
309