Why was being the subject of Sai Baba's jokes a desirable experience for devotees, as described in Chapter 24?

Chapter 24 explains that while people usually dislike being joked about, Sai Baba's humor was an exception that was greatly loved and even craved. The reason for this was twofold: the purpose and the delivery. The purpose was always to 'impress the essence of truth,' making the joke beneficial for the person's spiritual welfare. The delivery was described as 'effortless, novel, and natural.' As Chapter 24 details, Baba's smiling face, playful eyes, and accompanying gestures filled the humor with an 'indescribable' sweetness and flavor, ensuring the lesson was achieved immediately in a joyful and memorable way.