Laughter is not about laughing. It is actually about cultivating childlike playfulness. Once you learn to play, you dont have to laugh. Laughter will be the natural outcome of your playful inner child. If you want to get rid of your dependence on jokes and still want to laugh, simply become childlike.
How do you laugh when youre in no mood to laugh or dont have any reason to laugh? The answer is Theory of motion creates emotion. There is an inherent link between the body and mind. Whatever happens to the mind happens to the body. If you observe sad and depressed people, their bodies are also depressed.