Because everyone talks about how to USE mannequins (yes, I spelled it wrong in the tutorial XD) but not how to DRAW them. Which I always felt was an enormous oversight, because those things get scribbly and it's not always easy to tell what's going on.
And I WAS going to do hands and feet next, but this got too big, which is why I'm doing Mr. Sticks and the body from the back next instead. Because it's not a VERY different animal, but it's not necessarily intuitive.
My main teacher was a full length mirror, so I'm best at drawing those looking over the shoulder shots. XDD (Although I admit to using my classmates, family members, and random people on the street for models whether they knew it or not.)