No, it's not "just for sex blogs" here.
Subject Matter - You may blog about any subject you like, perhaps a current event or an epiphany you had today. Keep it interesting. Don't just describe what you did today. Talk about ideas, thoughts, or things you might have learned for example."
This is in the "guidelines" when you go to post a blog. As you can see, it's states; "You may blog about any subject you like,".