Scientific answers for Song of Kaho na, pyaar hai !

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 opposites 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 maz! aa, But science gives us all the information.
Na tum jaano na hum. I did my best to explain.