Everyone enjoys a lullaby. Even a manic, jumbled, nonsense one. J doesn't want to upset Mitch. It was inevitable, though, so he's not shocked when his friend wakes angry. He gives Mitch a scolding slap on the chest for fidgeting and struggling.

"Hold still. I...ah...I wouldn't want to slip."
He turns the knife in his hand so he can press down on Mitch's shoulder with one hand and stroke his hair softly with the other.
"I'll be careful I..ah..I'm going to fix everything nice. Just like you did for me. Pretty as a picture."
He tightens his fingers in Mitch's hair to hold his head still a second and kisses his cheek.
"Close your eyes. Be still. ... It's going to hurt."

As he lifts up again, he seems enraptured with the process of and actions involved. Getting a firm grip on Mitch's jaw, feeling a strong and furious body writhing under him slowly pulling the blankets loose, guiding the knife between soft lips. It scrapes the boy's teeth and he pulls it away. It's so damn hard to keep Mitch from thrashing. He's too strong. J slaps his cheek, rapture broken and anger on his face.
"Stop it! You're ruining it!"