You can read chapter 4 of We All Got it Coming
now, for free! (Warning: Hot gay sex!)
And if you like that, you might also like One Bloody Thing After Another
which is written by the same person, ME! And it's a real book that exists in real life with a pretty cover and flammable pages!
When I was a kid, I used to repeat everything I said under my breath. I had it pretty thoroughly teased out of me in junior high, and it's been gone since then. I always just sort of assumed that I was going over what I said to make sure it hadn't been stupid. That's what it was in my head anyway. And when I stopped, well, I stopped thinking about it. But lately I've developed a sort of word-stutter, when I'm talking. I'll repeat a word or pair of words three or four times. Sometimes I don't even notice I'm doing it. It just sort of flows. Sometimes, though, I will catch myself, and I'll have to change the sentence in order to get it out. It's not very often, but it's new and sort of bewildering.
Someone suggested that this sounded like palilalia
which it turns out it sounds EXACTLY like! So, I guess I have a weird condition I didn't know had a name!