Behavior Modificators

The HMO account manager noticed that nearly every bill from a certain pediatrician’s office included the line item “Behavior modification re-enforcers”.
Alarmed that the pediatrician was engaging in some unapproved, experimental psychological treatment or insurance fraud, she called the physician’s office to inquire.
“What on earth are behavior modification re-enforcers?”
“Lollipops,” was the reply.