K isn't ticklish, but he's sensitive to a welcome touch all the same; his breath catches so subtly that if they weren't kissing at the time it might have been missed, but he continues without pulling away. He makes a soft, approving sound - it's okay - and slides his own hand up further along the skin of Jesus's side, too, making sure to miss the rib he learned last time makes Jesus break away to keep from laughing.