The eternal struggle of non-technical folks trying to understand why we obsess over odd/even numbers! Little do they know it's the foundation of countless algorithms and optimizations. Is a number divisible by 2? That single bit determines if you can use bitwise operations, optimize memory alignment, implement efficient array partitioning, or even just create those perfectly balanced alternating-row table styles. It's not OCD—it's just good engineering practice! The difference between O(n/2) and O(n) might not matter to the average person, but it keeps us up at night.