What I don't understand is how a woman can do that, kneel and bend 90 degrees over without falling. It's like weighing your entire upper body against your lower legs, not possible or am I doing something wrong?
Women have their center of balance around the hips, representing more than half their weight. That weight is vertical to the ground and their upper body is lighter, easier to lift. Men, on the other hand, put most of their weight horizontalely, forward. Weight put forward gets heavier (physical law) and therefore is even harder to lift. Let's say that a man's upper body weights around 60% their total mass, put forward, it weight about 70% against, the rest 40%. You fall. The same happens to women, but most part of their total mass is back to the wall, vertical to it. Easier. Like 60% on the wall, and 55-60% horizontally. It's hard, but easier than for men.
That's the way I understand it, anyway.