Hm, I seem to be another exception and a new kind of exception.
I had a typing class (3rd grade) and used software for learning typing (Mavis Beacon on a Mac). Neither helped me to touch type, but I still learned to use all fingers when typing, and today I can do ~90 WPM -- although that's brain-to-typed letters; I go slower for transcribing a given text. I also use an ergonomic split keyboard that's much harder to use one-handed.
And the way that I learned was through gradual adjustment after needing to type a lot. Basically, I started out as a hunt/pecker (after trying Mavis and the classroom) and then made it a habit to, every once in a while, type a letter with a nearby finger instead of the forefinger. Over time, my hands moved less and less until they just settled on the method that is touch-typing, depending on what you count as T-T, since I have some quirks.
For example, I usually do capital letters with one hand (pinky on shift, one of the remaining other fingers for the letter) rather than using the opposite hand to shift.
And I actually prefer using the keyboard when possible: for a while I was on a quest to see how long I could go without using the mouse, even so far as to add and edit a firefox extension that let me browse the web with one hand on the keyboard. (I took one of the existing ones and changed it so it only used keys on the left side of the keyboard.)
And how does this not make you a special snowflake?
I am beginning to suspect that it is surprisingly common for intelligent, competent adults to somehow make it through the world for a few decades while missing some ordinary skill, like mailing a physical letter, folding a fitted sheet, depositing a check, or reading a bus schedule. Since these tasks are often presented atomically - or, worse, embedded implicitly into other instructions - and it is often possible to get around the need for them, this ignorance is not self-correcting. One can Google "how to deposit a check" and similar phrases, but the sorts of instructions that crop up are often misleading, rely on entangled and potentially similarly-deficient knowledge to be understandable, or are not so much instructions as they are tips and tricks and warnings for people who already know the basic procedure. Asking other people is more effective because they can respond to requests for clarification (and physically pointing at stuff is useful too), but embarrassing, since lacking these skills as an adult is stigmatized. (They are rarely even considered skills by people who have had them for a while.)
This seems like a bad situation. And - if I am correct and gaps like these are common - then it is something of a collective action problem to handle gap-filling without undue social drama. Supposedly, we're good at collective action problems, us rationalists, right? So I propose a thread for the purpose here, with the stipulation that all replies to gap announcements are to be constructive attempts at conveying the relevant procedural knowledge. No asking "how did you manage to be X years old without knowing that?" - if the gap-haver wishes to volunteer the information, that is fine, but asking is to be considered poor form.
(And yes, I have one. It's this: how in the world do people go about the supposedly atomic action of investing in the stock market? Here I am, sitting at my computer, and suppose I want a share of Apple - there isn't a button that says "Buy Our Stock" on their website. There goes my one idea. Where do I go and what do I do there?)