handsome and cool

So for Church yesterday, Cookie let the boys pick out their own outfits. Bubba proceeds to come down the stairs and say, "Look Mom!"

So I look at him in his cute stripped yellow shirt and jeans. I said, "Wow Bubba, you look handsome!"

He said, "I am handsome mom."

So...In the car on the way to church, Bubba randomly calls out to Cookie, "Dad! You look nice!"
Cookie said, "You too Den, you look nice too."

WHY does he respond with, "I look nice too because I'M COOL!!!"