Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline Melon seed effect: low-level happiness is indulgence, and high-level happiness depends on self-discipline