I've gone too far apparently

As the relationship between father and son continue to grow into the best friend status I have learned that my role as a father extends from the big bad wolf that says when enough is enough, to also the embarassing your dad is crazy goofy. We tease each other as boys will be boys. Yet Luke has found the line that must not be crossed. As I bagger him a little bit he gets the laugher into high gear. Then without a hesitation he stops and grabs my face. Left hand and right hand both on my face so I cannot look elsewhere but to his eyes. He tells me, "You need to stop okay." Wow, shot down by my own boy. Let's see if he really means it... Again I blow on his belly.... He stops and repeats, "Daddy, you need to stop okay." Jeez, we were having a good time. Oh well, I'm sure he wants me to do it again in a couple minutes.