Why fried food makes people fat?

I came out a thought while I was eating fried chicken tonight, why fried food makes people fat?

Is it because of the fried food itself? Maybe, but I think it is the thing you drink while having fried chicken makes you fat.

I believe we all got thirsty easily while eating fried food, and we drink soft drinks, alcohol, tea, or maybe water at the same time.

And those drinks are what make us fat; just an idea from my mind, maybe I am totally wrong.