Always the same chair, always the same side of the table. For many, this might seem like a small habit, but for science, it reveals a deeper need for predictability in the brain. In both restaurants and at home, some people never deviate from their preferred seat or routine. This repeated behavior offers insight into how the brain deals with uncertainty. Every decision, even a minor one, uses mental energy. By repeating the same actions in familiar settings, the brain automates these choices, freeing up mental resources for more important tasks. A 2017 study published in Personality and Individual Differences by neuropsychologist Karen Ersche and her team from the University of Cambridge explored this phenomenon. The researchers found that most people, without realizing it, buy the same foods, use the same spices, and sit in the same place at the table. To measure this tendency, the team created a 27-item questionnaire called the Creature of Habit Scale, validated with hundreds of participants. The results showed that people who are more prone to stress tend to rely more on automatic routines, especially around meals. Sitting in the same place acts as a security signal for the brain, reducing mental load even before the meal begins. For some individuals, this need for consistency goes beyond a personal preference. The DSM-5, the diagnostic manual used by the American Psychiatric Association, lists "insistence on similarity" and "inflexible adherence to routines" as part of the criteria for autism spectrum disorder. The manual notes that people with autism may experience significant distress when faced with minor changes, which is why they might need to eat or sit the same way every time. Other neuroatypical conditions, such as ADHD or certain anxiety disorders, also involve challenges in handling unexpected situations, though the underlying mechanisms differ. While autism is associated with a need for sensory and cognitive predictability, generalized anxiety often perceives the unexpected as a threat. In both cases, having a fixed place at the table becomes a tool for self-regulation, almost like a therapeutic ritual. This behavior should not be mistaken for a simple caprice or a lack of flexibility. When someone asks for "their" chair, it is often a reflection of a deeper need for stability and control. Understanding this can lead to greater empathy and respect for others' habits and preferences.