It was not an experiment.
Jazz knew at the age of 2 that she was a girl.
She even said, "I have a boy body with a girl brain."
She insisted on dressing as a girl.
Nobody 'groomed' her, she just knew it.
And BTW, fat shaming her is 1. Disgusting and 2. Her weight has nothing to do with her gender identity.
She struggles with an eating disorder (binge eating), something that many other people do.
And PS she is wicked smart and goes to Harvard University.
This is her story:
https://youtu.be/6nR16HZ5rEg