The Fathead Rule

Once there was a boy who came to his father and asked, “Dad, some of my friends are getting together next weekend. They said they’re going to stay up all night watching movies and playing video games and invited me to come. I was wondering what you thought.” His father looked at his son,
“What do you think?”
“Well, I know there’s nothing sinful about watching a movie or playing a video game or even staying up all night, but I’m still not sure about it.” His father nodded,
“Let me ask you this, son: is it a sin to eat dirt?” His son grinned and shook his head,
“No.”
“Is it a sin to repeatedly slam your finger in a car door?”
“No.”
“Is it a sin to wear a snow suit to the beach in the middle of the summer?”
“No, Dad. So you’re saying that it might not be a sin, but it may very well be stupid.”
“Something like that. It’s the fathead rule, son. Somewhere in Proverbs it says, my son, look at all those fatheads doing fathead things. Don’t be a fathead.”
“Dad?”
“Yes?”
“What should I tell my friends?”
“Tell them you already have plans. Tell them that you were already planning to have a big bowl of dirt for dinner and you won’t be feeling up to it.”
“Thanks, Dad.”
“Sure. And son?”
“Yes?”
“Thanks for not being a fathead.”