https://www.youtube.com/watch?v=mnl2_zyLhtY
Here is a short video. You take two steps back from a wall, place the top of your head on the wall, pick up the chair and stand up. But, after watching some videos they say it is because women have smaller feet so they are closer to the wall which helps keep their center of mass closer to the chair.
IDK - I figured it had something to do with the pelvis.
Watch the whole video. They explain it’s because women have shorter feet so they wind up closer to the wall.
When the husband stands at exactly the same distance as wife, he can do it too.