No, I don't go all in with the flower-chocolate-pink-industrial complex for tomorrow's holiday, but here is a cool visual illusion with a Valentine's theme.
Also related to, ahem, romance... Mind Hacks describes a study with a very different view on what it means when your girl is loud in bed. Sorry, guys.
Going on a first date? The ever-amazing OK Cupid Blog gives you some questions you can ask on your first date that give you some good information about things you'd really like to know.
Barking up the Wrong Tree shows that altruism does get paid forward.
Jonah Lehrer asks whether science is getting harder over time.
Science describes a cool study asking what George Washington (and others living before cameras) really looked like.