Kyon chalti hai pawan, Because of evaporation.

Kyon jhoome hai gagan, Because of earth's revolution.

Kyon machalta hai mann, Because of excessive respiration.

Na tum jaano Na hum. But I just gave all the reasons!

Kyon aati hai bahaar, Because of a change in season,

Kyon lutata hai karaar, Because of mental tension.

Kyon hota hai pyaar, Because of opposite attraction.

Na tum jaano Na hum. Like I said, these are all science phenomenon!

Kyon gum hai har disha, because you have a poor sense of direction.

Kyon hota hai nasha, Because of drug addiction.

Kyon aata hai mazaa, But science gives us all the information.

Na tum jaano Na hum. I did my best to explain, now just shut up!