It almost made him growl, the way Colin kept teasing him so much. Zach was pushing up as much as he could into it, but it kept...not...working. Finally, one of his hands came to find Colin's, taking it and pressing it harder into his own side. And with it came a pleasant pleased satisfied moan that had built up over each time Colin came over and didn't use his nails much.
His hips continued to rock up against Colin's, though of course they were now better lined up, for, well, it wasn't like it was happening. Zach groaned.