They never taught me. Just like they never taught me how to cook, or do laundry. And I still can't. I am completely dependent on them, just the way they like it.
Every time one of my sisters turned 5 years old, our Mom would teach them how to wash the dishes, starting with small and easy stuff but having a grand time and lots, lots of bubbles.
Then, when one of us brothers turned 5 years old, our Dad would do the very same thing.
Fun, fun, great times because it was like a "graduation" thing when we turned 5 years old.
Now, all of us brothers do all house cleaning, chores, kids, etc, and to me personally, it is an awesome pleasure seeing my brothers helping their wives and girlfriends with the same care and love Dad did with our Mother.