Most women will break their thumbs if they tried to through a real punch because they don't even know how to make a fist. LOL.
People that have never been in a real fight have all kinds of misconceptions of what it is really like. They imagine what they will do in the fight, the punches, kicks, whatever, and the imaginary opponent always falls for them. The first punch to the face that you get that rings your bell is a revelation where all plans go out the window. I still remember mine. The first time it happened to me I got my azz handed to me because I froze. The next time it happened I knew what was happening and fought through it.
My Dad gave me that lesson when I was a kid in single digits. You make a fist like that, all that's gonna happen is you are going to break your thumb. I'm in my 60's now; but, I still remember that lesson.