Sneezing is a trigeminal reflex: irritation in the nasal cavity triggers a coordinated explosive exhalation. Most humans sneeze in clusters of 2-3; a minority reach 4-5. The biological mechanism is consistent across individuals. Yet otolaryngologist Dr. Benjamin Ochoa documented a unique pattern: the man sneezes precisely once per irritant exposure, with unusual force—a single, decisive expulsion of nasal contents that leaves no room for continuation. Ochoa hypothesized that while the trigeminal reflex fires identically to other humans, the *psychological expectation* of a second sneeze may trigger continued irritation in most people. But in his case, the single sneeze is *final*—the body understands that a second would be redundant, that he has already completed what needed completing. Ochoa's notes: "The sneeze isn't a single instance of an involuntary reflex. It's an absolute statement: 'I have expelled the irritant. We are finished.'"

Most reflexes are repeated for reinforcement. Some reflexes respect the principle of sufficiency.