The prefrontal cortex manages 'Task Sequencing' (breaking tasks into manageable steps) and 'Inhibitory Control' (stopping the current task to start a new one). Transitioning to a shower demands both systems to fire perfectly. You have to inhibit what you are currently doing (scrolling), and sequence a long chain of hygienic actions.
Because the ADHD brain has a dopamine deficit, both of these systems are constantly stalling. The brain experiences "Transition Anxiety." It calculates the cognitive energy required to manage the thermal shock of stepping out of the warm water into the cold bathroom air. It realizes it lacks the energy reserves, and triggers task avoidance.
Simultaneously, 'Time Blindness' distorts the reality of the shower. Once an ADHD person gets *into* the shower, the hot water provides a cocoon of steady, pleasant sensory input (white noise and warmth). The brain instantly habituates and now refuses to transition out of the shower. The 5-minute shower becomes a 45-minute trance, making you late for work. The brain remembers this past trauma, making it even harder to initiate the next shower.
