That was definitely enough to do it, it wasn't that his ears were particularly sensitive, no more or less sensitive than the rest of him, really, it was just that most people didn't think to pay attention to them at all, and he was already strung taut, so any sensation was going to register as good at the moment.

There was also the fact that with Peter all but mauling his ear like that meant that he could hear Peter's breathing and the effect he was having on it. The hand at Peter's ribs slid around to the middle of his back even as Thor sat back, knowing that Peter's hold on his hair and his shoulder wasn't likely to slacken as he did so, and that he'd be able to lift him easily enough with that hand at his back, drawing the other man up against his chest, letting him settle that much more securely on Thor's cock thanks to the position.

Of course, that wasn't going to stop Thor from thrusting up into him all the same, despite it taking a little more effort in this position, he was close to the brink and wouldn't have to maintain it for very long.