Chastity and orgasm denial discussion

My second Ms Lori cage arrived recently and I love it. After many years and many chastity devices, I finally have a secure, comfortable and very effective device that is suitable for extended wear. Thank You Ms Lori! After a few trial sessions to be assured of the fit and function, my Keyholder and I had a locking ceremony on Valentines Day. We agreed upon an initial duration of one week which represented the average removal of our previous cages due to discomfort issues. As of this morning, five days in, there are absolutely no problems wearing my new chastity cage. As such, my Keyholder has informed me that my one week session has been extended indefinitely. She, BTW, has the right to do this per our previously established chastity agreement. I have also been told that the exact duration will not be disclosed to me due to penalty changes, however, it will not be less than 90 days. My questions are as follows, where did this 90 day rule come from because I’ve heard reference to it many times in books, articles and on forums. Additionally, and more importantly, I have read about the psychological and physical changes that one goes through during this initial period. I’ve heard reports (not necessarily in this order) of agitation, denial, mood swings, acceptance, nocturnal emissions, surrender, submission and devotion. If anyone can offer advice on these issues and the order/time frame of occurrence, it might be helpful to know what I am in for. Thank You!