too much stimulation. the ways in which we are and can be stimulated are increasingly devisable and persistent. Information or stimulation addiction is a thing...
Hah, preaching to the choir here, ADHD brain that basically shuts down unless there is a constant supply of new and interesting stimuli. I usually can't even get enough, so I end up sleeping for 13 hours and then not even staying up for 8 afterwards. I literally need "stimulants" in order to even have a 24-hour schedule, lol.