I used to write fanfiction a lot. But then I didn't anymore, and I thought I'd put all that behind me. One week I was bored, and since I'm an obsessive squeeing fangirl for Supernatural I started Googling. I found the Wiki and diddled away a couple of hours on the Vernacular page, laughing my ass off at Magical Healing Cock, "And then they had sex", et cetera. And it may be childish and goofy, but I totally missed silly fandom crap like that.
My Word program and I reacquainted ourselves, and I wrote 13k words of fic in four days.