If you're condemned to death they have to give you one last meal of your choice. What is that all about? A group of people plans to kill you, so they want you to eat something you like? Do they think the food part will take your mind off the dying part? Or do they prefer to kill you when you're just coming off a peak experience and full of positive energy?
The belief that unhappiness is selfless and happiness is selfish is misguided. It's more selfless to act happy. It takes energy, generosity, and discipline to be unfailingly lighthearted, yet everyone takes the happy person for granted. No one is careful of his feelings or tries to keep his spirits high. He seems self-sufficient; he becomes a cushion for others. And because happiness seems unforced, that person usually gets no credit.