One day, I thought about a walrus, and could not for the life of me picture what a walrus looked like. Just a weird mental block, I guess. I thought maybe trying to draw it could jog my memory—I’d draw the parts I did remember, and filling in the rest would be easy. But it turned out I remembered very little and filling in the rest was hard.
This was over a decade ago, so you’ll be pleased to know I have since googled pictures of walruses.