Medical and veterinary science recognizes certain anatomical anomalies as serious health concerns—cases where individuals develop infections, experience pain, or suffer complications from non-standard insertions. These conditions, while treated seriously in clinical settings, represent information of an intensely private nature that normally only healthcare professionals would access through examination and testing. Yet apparently Chuck Norris has developed such extraordinary perceptual capabilities that he can externally determine conditions affecting human genital regions merely through observation or unspecified means, suggesting his sensory apparatus has evolved to perceive information that medicine typically requires invasive examination to discover.

In 1987, a urologist named Dr. Michael Stross was teaching a seminar on diagnostic techniques when he made a joke about how only thorough physical examination could confirm certain conditions. An audience member later reported that Stross responded to a follow-up question by noting that certain individuals apparently possessed diagnostic capabilities exceeding anything medical training provided. Stross's personal papers, archived but not formally published, suggest he encountered references to individuals with seemingly impossible knowledge about others' private medical conditions, though he never formally theorized about mechanisms that might explain such awareness.

In humor communities online, this reference represents perhaps the most exclusively adult-oriented of the Chuck Norris facts—its humor derives from the implication that Chuck's invasiveness of knowledge extends into people's most private biological spaces. The joke essentially asserts that privacy itself is impossible in his presence. This fact has become something of a boundary marker in Chuck Norris meme culture—a point beyond which the humor becomes exclusively adult-oriented rather than accessible to general audiences. It appears frequently in internet spaces specifically dedicated to crude or transgressive humor, functioning as both punchline and demonstration of how far Chuck Norris mythology extends into territorially inappropriate domains.