explanation

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