In the same episode, Paulie, getting superstitious, visits a psychic who names people Paulie has killed, which includes Mikey. The psychic then tells Paulie that Mikey wants to know if it nonetheless itches, a reference to Paulie functioning into a poison ivy bush when chasing Mikey through the woods. https://mike14578.boyblogguide.com/19832513/helping-the-others-realize-the-advantages-of-mike-the-great