You need to call child services, NOW. These stupid pediatricians. I don't know why the stupid woman felt she needed the okay from the doc. The child said they learned the behavior from their uncle. What they said sounds like sexual abuse to me. They need therapy, and the uncle needs to get behind bars, ASAP. Actually, if the daycare did not report this there could be very serious consequences.
No, the behavior is not normal and does not occur spontaneously to children. Now, whether or not the uncle in fact behaved in the manner that was reported needs to be determined. But the fact that his name surfaced in the questioning about the episode invites serious concern. The pediatrician should not have been so reassuring.