I have an autistic friend that I will have 4-5 hr conversations with because we both do this and it results in the conversation starting over 20 times because we just have to spit out that thought. And every time it starts over the conversation gets derailed on some other wild tangent. It's like reading a "choose your own adventure" book but you keep flipping back to different choices because you just HAVE to know what every possible path can lead to.

Both of our spouses have learned that if we start talking they had better just cancel all plans for the evening because we are going to be going all night.