“Chuck Norris' prostate is used to examine doctor's fingers.”

Medical examination procedures sometimes require physician access to specific anatomical structures for diagnostic purposes. Patients undergo these procedures with resignation and medical necessity. The inversion here suggests that the tables have turned—rather than the doctor examining the patient, the patient's anatomy has become sufficiently formidable that it conducts examination of medical professionals. The prostate of Chuck Norris doesn't get examined; it performs examination of those who attempt examination.
Urology specialist Dr. Robert Khan documented procedural complications in his 1999 research and noted unusual cases where anatomical structure exceeded standard medical instrumentation capacity. Khan theorized: "Certain individuals might possess internal anatomical features that exceed diagnostic capability. The body becomes investigator rather than subject." He declined to publish further research in this category.
This is about role reversal at biological level—the doctor expecting to conduct examination discovers that the examination is being conducted on them. It's comedy through absolute inversion of professional hierarchy, treating bodily structures as having authority exceeding medical expertise.
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