Comment 2. Duh. But... (Score 3, Interesting) 814
I always put 2 spaces at the end of a sentence. Oddly, though, I've noticed that when I type, if it's a space between words I use my right thumb. For the end of my sentence, I use my left one. Something I didn't even realize I did until about 6 months ago, and I've been doing this for about 20 years!