On the way Pauline rotates. Think of it this way.

For X rotate, think of the AXIS (not the figure) going from right to left. The part will rotate along that axis. So being that X axis goes from left to right, the part or figure will rotate forward or backward.

For Y rotate, the axis runs vertically.  So rotating along the Y axis will TURN the figure left to right.

For Z rotate, the axis runs front to back. So rotating along the Z axis will TILT the figure left to right (in other words, she'd lean leftward or rightward).

I believe figures and props all work that way.

I'm updating docs and will make a note to add this explanation.