All the best teachers I've worked with have this skill. I use the "translator" analogy as well.

Though I've found it's not so much "remembering" the confusion and mysteries from your own past, but paying very close attention to the student(s) so you notice as soon as there's some divergence in their mental model from what you're trying to relate.

Stop, slow down, address the assumptions you didn't even realise you were making, and it's amazing how much complexity and knowledge you can seemingly transfer into someone else's brain.

Of course they'll forget 2/3 of it over night, but it's easier next time, and once they've "gotten" it (and the corresponding endorphins) once they've got way more motivation to keep going.