Now he’s a whywolf.
Explanation: This joke is a play on the word “werewolf” and the philosophical question “why.” A werewolf is a mythical creature that transforms from a human into a wolf. The joke suggests that after studying philosophy, instead of being a “werewolf,” the creature now spends time pondering deep questions, particularly the big “why” questions that are central to philosophical inquiry. The transformation from “werewolf” to “whywolf” humorously suggests that the werewolf is now obsessed with seeking meaning and understanding.