I've been double-spacing after my periods since I was in single-digits; it's how I was taught, and I admit I've always had kind of a snobbishness about how I type like I'm at a typewriter rather than a modern keyboard. Well, I'm on day 10 of training myself not doing that, and it's actually going surprisingly well. It was a lot of trouble for the first couple days to train myself out of the muscle memory, but I think I'm doing okay.