The Yoni Egg - How Does It Differ From Vaginal Weightlifting?

I read about the "Yoni Egg" two years ago, about women calling themselves womb goddesses and instructors and how to access the female power within us. The use of yoni Egg was mentioned a lot and I wanted to know more about the egg and the vaginal worship...

What would our grandmothers and mothers say to this new age talk? Imagine the yoni egg movement - a crystal that is shaped in form of an egg and inserted into the body via the vagina. What benefits would inserting crystal do for the woman body that wearing it would not do? Is this going too far all in the name of the feminism and empowerment. The reason I use our grandmothers here, is because they were vocal and a force to be reckoned with before technology became 

In a day and age where women are still reeling from issues and situations they have consciously and unconsciously created. Women coming together in unison will ease the ills of the universe a lot. How will the use of the yoni egg solve issues of women hating on one another?

1. Is there a secret behind the usage of yoni egg that can not be learnt otherwise?
2. is it the be-it-all of a woman's sexual creativity and release of feminine powers?
3. is this what powerful women in all walks of life and relationship use to accomplish such feat?

I have lots of questions, but from all the sites I visited they all bordered on one word "Sex" There I was thinking doing such exercise as vaginal weightlifting. see here, would help a woman become stronger and empowered!

What are your experiences of using the yoni egg, has it changed your life as a women for good, and please don't tell me it improved you sexually to gain confidence in yourself and abilities. If that is the only reason, I will give it a pass... Share your stories.

I wonder what the nymphomaniacs would say about the yoni egg.