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 mazaa!, But science gives us all the information. Na tum jaano na hum. I did my best to explain to u what do u say?????