I look at the pre-edit title of the previous post (preserved for posterity in the URL) and wonder "Was I typing with my nose? Did I have a seizure?"
Tangentially-related, I don't touch-type in the classic sense of the word, in that I don't sit with eight fingers poised over the home keys, but rather do this sort of "rote and peck" using seven fingers. Mavis Beacon would frown on the "H" being struck with the left index finger and perhaps give an indignant sniff at a "G" or "T" being operated by the left traffic digit.
At any rate, as my hands have largely freed themselves from needing direct visual supervision to drive the keyboard, homonym replacement errors have crept in. It's like the digits get the order from the brain to go off and type the word "there" and they're all "Sure thing, boss! We know how to spell that!" and then produce "they're". Obviously I know the difference, but there has to be some weird neuromotor thing at work there for it to only crop up once I no longer had to watch myself type...