This is an 18+ exchange. I understand that underage writers are a part of fandom—I know I sure was, and I don't want to be a hypocrite! But the thing is, if a participant under the age of 18 signed up and requested smut, it just wouldn't be fair to their prospective creator. I am not checking the personal information of everyone who signs up, but if I somehow found out that an underage person has signed up, I would have to delete their signup. This has never happened to me in any exchange I've run, and I hope it never does.