Watching His Ass Bounce on Her

Everyone is 18.

The rhythmic slap of skin on skin echoed through the empty gym showers, each wet impact accompanied by a muffled gasp. I stood frozen, my sneakers silent against the tile floor, my breath caught in my throat like a fishhook. The steam from the hot water clung to the air, thick and suffocating, but it wasn’t the heat that made me sweat. It was the sight of him—Grant, my best friend, his athletic frame glistening under the flickering fluorescent lights, driving into her with a force that seemed almost otherworldly.

He was naked, save for the water cascading down his broad shoulders and chiseled back. His body was a testament to years of relentless training—lean muscle coiled tight, his ass flexing with each thrust, smooth and hairless, like a statue carved by some lustful Renaissance sculptor. I’d seen him shirtless countless times on the field or in the locker room, but this? This was different. This was primal.

She—a senior, her name escaped me—was pinned against the shower wall, her legs wrapped around his waist. Her moans were low and ragged, almost pained, but the way she clung to him told a different story. “It’s too much,” she whispered, her voice trembling. Grant didn’t slow down. If anything, he seemed to relish it, his lips curling into a smirk as he buried himself deeper, his cock—Christ, his cock—thick and veined, sliding in and out of her with a rhythm that was almost hypnotic.

I shouldn’t have been there. I’d only come back to the gym to grab my forgotten water bottle, but now I was rooted to the spot, hidden in the shadows, my heart pounding in my chest like Poe’s telltale heart. My body betrayed me, a heat pooling low in my stomach, my cock hardening against my will. I literally had to hold my aching firmness through my pants just to ease the tension. I wanted to look away, to leave, to pretend I hadn’t seen anything, but I couldn’t. My eyes were glued to the scene before me, to the way his muscles rippled with every movement, to the way she arched her back, her nails digging into his skin. When I watched him tense and finish inside her, I unexpectedly throbbed and ruined my underwear. I held my pulsing shaft through the bizarre pleasure until it abated. My brain suddenly gained some sense, and just as they began to shower off, I hurried out.

–[]–

The next day in the cafeteria, I sat across from Grant as we ate, the memory of the previous night still burning in my mind. He looked the same as always—confident, carefree, his black hair damp from practice, his biceps flexing as he reached for his sandwich. I hesitated before speaking, the words tumbling out before I could stop them. “I saw you yesterday. In the showers.”

He froze mid-bite, his blue eyes locking onto mine. For a moment, I thought he’d be angry, embarrassed even. But then that damn smirk crept across his face, the same one he wore when he knew he had the upper hand. “Oh yeah?” he said, leaning back in his chair. “You like what you saw?”

I swallowed hard, my mouth suddenly dry. “Hell yeah, man. She’s hot.”

Grant laughed, and I got a tingle down my body. “You should watch again sometime. I’ll keep you updated.” The way he said it, so nonchalant, so knowing, made my stomach twist. He wasn’t just inviting me to watch—he was daring me to.

Later that evening, he sent me a text. No words, just a picture. Her, naked, her body splayed out on a bed, her skin glowing under the soft light. It was the first time I’d ever seen nudes of someone I knew, and my initial reaction was primal, a rush of heat straight to my groin. But as I stared at the image, something shifted. Her body was beautiful, yes, but it wasn’t her that held my attention. It was the thought of him—of Grant, his hands on her, his cock buried inside her. The way he moved, the way he controlled her, dominated her. It wasn’t just her I was fantasizing about. It was him. It's like watching lesbian porn, I thought, What's the point if there's no dick involved?

I tossed my phone onto the bed, my mind racing. This wasn’t supposed to happen. We were both straight—or at least, I thought we were. Girls loved us. We were the guys everyone wanted to be, the guys everyone wanted to be with. Grant with his athletic build, his charm, his effortless confidence; me with my slim frame, my sharp jawline, my quiet intensity. We were different, but we worked. We balanced each other out.

But now? Now I wasn’t so sure. The lines were blurring, my thoughts muddied by the image of him in the showers, by the way he moved his body, taking what he wants, the way he laughed, the way he looked at me. I needed to figure this out, to untangle the mess in my head before it consumed me.

The next time he texted me, it was a simple message: Showers. 8 PM.

I didn’t respond, but I went anyway. I told myself it was just curiosity, just a way to prove to myself that it wasn’t what I thought it was. But deep down, I knew better. This wasn’t about her. This was about him. Somehow, it was about us.

The gym was quiet when I arrived, the only sound the faint hum of the fluorescent lights. I moved through the locker room silently, my footsteps echoing softly against the tiles. When I reached the showers, I saw them again—Grant and her, tangled together under the spray of water. This time, she was on her knees facing the wall, her hands braced against the tile, her moans louder, more desperate. Grant was behind her, squatting down in a "bulldog style fuck", his hands gripping her hips, his cock plunging into her with a ferocity that made my mouth go dry. I could see his pink hole when his muscular cheeks spread apart. He was going at her like an animal this time.

He caught my eye over his shoulder, his gaze locking onto mine. There was no surprise in his expression, no hesitation. Just that fucking smirk, the one that said he knew exactly why I was there. He didn’t stop, didn’t even falter. If anything, he seemed to move faster, harder, his muscles straining with the effort. She cried out, her body trembling, but he didn’t let up. He kept going, his eyes never leaving mine, until she finally collapsed against the wall, spent and gasping for air. I watched his enormous, hard cock pop out of her, wet with her juices. He kept looking at me as he stroked it instinctively, as she caught her breath. Apparently her pussy needed a break, because when she caught her breath she turned around on all fours and started sucking him. She could only get the tip inside, but he helped her go down a bit deeper. He pulled out after a minute and jerked off, unloading with a groan onto her face while she opened her mouth, his large balls nearly slapping her chin. His body tensed, and he gave me one last look before I turned to leave, to avoid being caught. Did he wink at me?

–[]–

The next day at lunch, Grant slid into the seat beside me, his knee brushing mine under the table. “Got something to show you,” he said, his voice low, almost conspiratorial. He pulled out his phone, the screen glowing with a series of thumbnails. “But we can’t do it here. Too risky.”

I raised an eyebrow, curiosity piqued despite the knot tightening in my stomach. “Where, then?”

“Band room,” he said, standing up. “It’s empty during lunch. Come on.”

I followed him, my heart pounding in my chest. The hallways were quiet, the usual lunchtime chatter muted behind closed doors. When we reached the band room, Grant locked the door behind us and gestured for me to sit on one of the folding chairs. He stood in front of me, his phone in hand, and started swiping through the videos. “Check this out,” he said, his voice low and tinged with something I couldn’t quite place.

The videos were graphic, raw, and unmistakably him, even the ones where you could only see his cock. She was in different positions, different settings, but the star of each one was undeniably Grant. He narrated to me as he played them, his voice steady but with an edge of excitement.

“This was after practice last week,” he said, pointing to the screen, “She couldn’t get enough of me. Begged me to go harder.”

As he spoke, I noticed him getting hard in his jeans, his bulge straining against the fabric. He didn’t even try to hide it, rather, to my surprise, he boldly unzipped and started jerking off, not even 16 inches away from me.

I was frozen, caught between shock and arousal. His hand moved in slow, deliberate strokes, his eyes locked on mine.

“Join me,” he said, his voice almost a command. I hesitated for a moment, then gave in, pulling down my pants and gripping myself. Barely a touch, and I was already cumming, my release spilling onto the floor between us. I missed my aim, getting some on both of our shoes. Grant laughed, and I could feel my whole body turn red.

“You must really like her,” he said, finishing himself off casually onto the floor with a groan. He zipped up and looked at me, that same fucking smirk on his face.

“Come to my house tonight. I’ve got a surprise.”

“Don’t you share a room with your brother?”

“Yup,” he said, and gave me a wink before I followed him out of the band room.