Pinterest.....what the what?

Thank you Ms K, for another way to waste my time. I was having a really hard time trying to explain what Pinterest is to O. So you like stuff that other people also like. So everyone likes the same stuff. And you do this because...... ?? The thing that really bothers me about this is that I can't actually buy anything. So I like the stuff... but then what? Am I supposed to go make it?? I'm definitely no Martha Stewart. The clothing pics just make me want to know where they are from! It's driving me crazy! And the food pictures just make me so hungry. All in all, it's a terrible idea for someone like me who will sit on the ipad and pin stuff for hours at a time. As if the internet were not already a source of time wasting. But I love it.