.... Then he tried, hard, to make Kisame felt the way he had. He thrust back as furiously as he could, eyes closed as he let out a muffled moan. Kisame hissed.
Itachi panted through his nose, doing it again. He bit into the palm of his hand hard enough to draw blood as he whimpered. He pistoned back hard and fast, if not erratically, loving the feel of Kisame's flesh scraping against his prostate. He swallowed thickly, screwing his eyes shut in absolute pleasure. He panted hard through his nose.
He felt Kisame, behind him, becoming jerkier in his movements. Was he close? Itachi wondered. He longed to reach down and pump himself- oh god, he was so hard- but he couldn't. He needed the brace of the wall, and he couldn't risk removing his hand from his mouth. He just bit in a little deeper and whined.
He pushed back harder and harder, more urgent with every thrust. He felt himself getting closer, and he needed it bad. He found himself shaking desperately. Kisame's seed filled him suddenly, and he let out a surprised sound. His back went rigid as everything inside of him was drenched in heat. He heard Kisame growl out "Damn…" Kisame jerked once and scratched against Itachi's prostate again. Itachi whimpered, feeling a little bit of cum stream limply from his cock onto the floor.
Kisame left then, and Itachi slumped onto the floor exhausted. His leg muscles ached, but his hard-on raged. He had gotten a tiny bit of relief, but it didn't last long....