"Did You Watch Porn?" has a very simple mission: to find out if your friends watch porn.

If you go to the site and fill out a form, they'll send you a personalized link to send to your friends. When your friends open the site, you'll get sent a link to the porn they've been checking out. So you can also check them out. For purely research purposes.

Isn't this a huge invasion of privacy? Well, when you go to a site, your browser changes the color of visited links. Did You Watch Porn? has a database of porn sites stored, and if their JavaScript finds a match they send a message with an image much naughtier than the one you see above. So the answer is yes -- this pretty much is an invasion of privacy.

They promise up and down that they aren't storing any information about you or your friends, but look, it's a free service. Caveat emptor, which we've heard is Latin for "bros before hos."