The way I orient them is to reference a doctor using a reflex hammer to elicit a “knee jerk”.
Most people have had this and other deep tendon reflexes tapped at some point in the past.
I them tell them that I’m going to examine and treat them using the same “circuitry” doctors use with their reflex hammer.
The difference is I’ll be using reflexes for testing and treatment vs. the doctor who only uses them for testing.
I’ve yet to have a patient have a problem with my exam and treatment using PRRT™ once they relate my technique to something similiar their doctor uses.