"You didn't have to give in to my demands; in fact, you've been quite content to ignore my insisting that you should describe your symptoms to me." L did notice how warm Light's wrist felt, but he wasn't sure if he should write that off as a potential symptom or just assume that his own hands were naturally cooler. He also noticed something primal within him react to Light collapsing back onto the couch beside him, something that urged him to touch Light even more, to see exactly how the other man would react. It was part curiosity, a touch mischievous, and it roused a little excitement, even. While not terribly familiar with the urge to touch and explore another person's body, it in itself - no matter how quiet it was at the moment - helped L register exactly why Light had been panicking. That intellectual acknowledgment sent a shiver down L's throat and stomach, right into the area one would expect it to end. It was an area L hadn't spent all that much time with recently, an area he hadn't had need to spend all that much time with.

On the outside this epiphany appeared as L widely staring off past Light's face to the wall on the other side, one hand around Light's wrist and the other brought up to L's face to have a single finger hang in the air less than an inch away from his lips. He snapped out of it by shifting (not so much to change his position, but instead as a sign of slight discomfort) and looking back at Light, only to realize that woke an echo of the shiver he'd experienced before. The outward sign of this reaction was the finger hanging in front of L's lips suddenly dash toward those lips only to be chomped down on by the detective's teeth. The obvious conclusion was that Light wasn't satisfying Misa in their private life and Misa had opted to take matters into her own hands. According to this theory, the cake had in fact been intended for Light.