Jokes I want three headphones what does it mean

On the way to the Western Paradise, two Monkey Kings were killed. The real and fake Monkey King battle, up to the sky and down to the ground, overturning the clouds, but no one can distinguish between them. In the end, they found Rulai in the western sky. Rulai smiled and said, "Don't be impulsive. Put on your earphones and listen to some Brahma music to purify your souls. "The two monkeys nodded. One of the monkeys said, "I want three headphones..." The six-eared macaque died.

The Six-Eared Macaque has six ears.