He's taking comfort from the familiar feeling of being close like this, even without the physical sensation. It's how things have been all week except now he can hear and it makes things like this so much better. Frank actually laughs, close to her ear, nose rubbing against her cheek with the sound.

"I dunno, I think you should explain it to me." Don't have a heart attack, Karen, he understands okay!! He gets it. Suddenly, he's crawling away from her to land on his back and letting his head hit the pillow. The weird sensation of air rushing by his ears and being caught by the soft bed is disorienting, especially now when he can hear himself fall, but doesn't feel the follow-through so it's like he's still falling in a way. He blinks up at Karen a moment later expectantly, used to the way she usually gets close to him even though he can't feel her.