That's the fancy term for rigid thinking, thought loops that don't quit, usually over specific topics. Mostly made up of rumination, worry, and repetitive thoughts. Getting stuck on topics that are dead horses stinks. Personal one being the worry of "Am I gay"? I have ruminated on that jass for months off and on. Causing intrusive thoughts to arise and me to lose sleep. Though I have thoroughly thought about it, always concluding that "I'm not"; still the worry persists. What are y'alls experiences with this?