Posted because of Shego.
The pictures are funny, but they don't really do a very good job of copying the pose from the picture. If MJ really is sitting bolt-upright, that's a pretty odd pose. But the viewpoint is looking
down into her coffee mug. She's reclining on the couch, and when you take that into account it explains the arched back. The legs are in a bizarre combination of positions. Neither by themselves is odd, but together they don't fit. However, I have seen girls sit comfortably in positions that are just as contorted. Heck, I tried sitting in that position, and if my ankle were just a little more flexible, it'd be kinda comfy for a little while.
Overanalyzing kills the humor!