We can post if we want to, we can leave your friends behind, 'cause your friends don't post and if they don't post, well they're no friends of mine.
I say, we can go where we want to, a place where they will never find and we can act like we come from out of this world, leave the real one far behind
And we can post.

Obligatory reference to 80's pop single.
And Tumblr in a nutshell.