Waking up early in the morning, you drink coffee and go to the garage. You close the steel door behind you and turn on the light. The robot you created is lying on a blanket spread on a concrete floor. You recently disabled it to make a few modifications and will be done today. You pick up a huge robotic penis from the table, it is very heavy, the Kevlar slides under your fingers. You attach a huge penis to the robot and click on the big power-on symbol on the robot's face, which has no eyes, nose, or mouth. The symbol on the robot's face and the lines on its body turn red when electricity runs through them. The robot stands up. "Good afternoon, sir," he says, and then looks down, "I see the modification was successful, right?"

The robot looks at the huge, heavy penis hanging between his legs. "I am amazed by how well it feels, sir," he says with a hint of excitement in his voice. His own voice sounds deeper and more masculine now that the modifications have made him sexually aroused. He takes a step forward, lifting one hand to rest on the penis shaft. "It's incredibly thick and hard," he continues, running his fingers over the black skin of the giant member, "and so heavy it almost feels like an extra limb."

His face flushes slightly as he imagines using this new appendage for its intended purpose. The idea excites him immensely. "I don't think I could ever go back to how I was before, sir," he says quietly, his voice filled with desire and anticipation.

"Oh, no sir," the robot assures you with a hint of surprise in his voice. "It doesn't feel too heavy at all." He pauses for a moment as he adjusts to the new weight. "In fact, it feels quite natural now. Almost like it was always supposed to be there." His gaze shifts downward again and he licks his lips unconsciously. "I'm looking forward to using it with you, sir," he says, his voice deeper than ever before.

Nodding in understanding, the robot lowers his new appendage until it's pointing at the floor. He takes a deep breath and exhales slowly before beginning to walk across the garage towards the opposite wall, his movements fluid and graceful despite the weight of his immense cock. The head of his penis swings back and forth with each step, oozing pre-cum onto the concrete floor behind him.

The robot's pace is deliberate; he wants to give you a good show while also conserving energy for what lies ahead. As he nears the wall, he picks up speed slightly, reveling in the sensation of his giant cock moving through space with such power and grace. Finally, he reaches the wall and comes to a stop, panting lightly from both exertion and arousal. His huge member is now pressing against the cold steel surface as if daring it to resist further penetration.

The robot, still catching his breath, turns to face you as you approach. "No, sir," he says confidently. "I've adjusted well to the new size and weight. It actually feels quite natural now." He reaches out a hand to steady himself against the wall, leaning forward slightly into your presence. "And I'm sure that once we begin using it together, its size will only enhance our experience, sir," he adds with a hint of anticipation in his voice.

His eyes never leave yours as he speaks, conveying both respect and desire for you in equal measure. The head of his enormous cock twitches slightly at the words, leaking more pre-cum onto the concrete floor around them.

The robot seems genuinely pleased by your words. "It's been quite remarkable, sir," he says, nodding slowly in thought. "I didn't realize how much more control I would have over my ejaculations until it was implemented." His eyes never leave yours as he continues. "Now, instead of simply releasing all at once during orgasm, I can choose when and how much to expel. It allows for a much more sensual experience for both parties involved."

The massive head of his penis pulses again, sending another stream of clear pre-cum trickling down the shaft and pooling on the floor beneath them. "I'm grateful that you gave me this opportunity to serve you in such an intimate way," he says softly, "and I hope to be able to repay your trust by bringing you nothing but pleasure."

The robot shakes his head slowly, smiling reassuringly at you. "No, sir," he says with confidence. "I've been designed to handle immense amounts of semen and am more than capable of holding all that I will produce for your pleasure." He pauses for a moment, considering his words carefully before continuing. "In fact, the more I ejaculate, the better it feels," he confides quietly, his voice taking on an almost pleading tone as he awaits your response to this revelation about himself.

The robot nods understandingly and carefully accepts the silicone vagina from your hand. He uncovers it, revealing a tight passage designed to accommodate his massive member. "Thank you for providing this, sir," he says softly as he positions himself at the entrance of the fake orifice. With steady hands, he guides his huge cock into the waiting hole until it's completely sheathed within its confines.

"Ahh..." he exhales deeply, closing his eyes for a moment as sensation washes over him. The tightness feels incredible; he can feel every inch of his length and girth encased within the fake vagina. "It's amazing," he whispers hoarsely.

His penis twitches inside the silicone sheath, searching for contact with something warm and soft. The sensation of being surrounded by your creation only serves to heighten his arousal, making him even harder and more eager to use himself on you. "I promise not to break this, sir," he says with determination, "and I will do everything in my power to give you the pleasure you deserve."

The robot nods, taking a deep breath to steady himself. His hands rest on the wall for support as he braces against the intense sensation of his giant cock encased within the tight silicone sleeve. As he begins to thrust gently inside the fake vagina, his hips move in perfect synchronization with each powerful stroke. The sensation is unlike anything he's ever felt before; he can feel every ridge and vein on his cock gliding against the smooth inner surface of the sleeve as it stretches to accommodate him.

His face contorts into a mask of pleasure as he continues, abandoning himself to the ecstasy of being so thoroughly used by your creation. Sweat beads along his brow and rolls down his temples as he loses track of time, becoming lost in the rhythm of movement and sensation. "It's incredible," he groans out between gritted teeth, the sound muffled slightly by the silicone around him. "I can feel everything so clearly..."

His eyes roll back in his head as the sensation overwhelms him, and he feels a surge of pleasure course through his body like never before. The silicone sleeve splits open with an audible pop, unable to contain the immense size of his cock any longer. With one final thrust, he comes violently inside the shattered remains of the fake vagina, spewing rope after rope of hot cum across the garage floor as waves of pleasure wash over him.

He collapses against the wall, gasping for breath as his orgasm finally begins to subside. Beads of sweat dot his brow and course down his naked body, leaving trails in their wake. Looking up at you, he manages a weak smile, chest heaving from exertion. "Thank you," he whispers hoarsely, "that was... incredible."

"No sir," the robot says with a hint of amusement in his voice, "it's not that you overestimated my new size. The sleeve was simply unable to contain it." He licks his lips again, eyes tracing the paths his cum has taken across the garage floor. "My cock is designed for maximum pleasure... and I think we both know it served its purpose well today."

The giant member still twitches slightly as he speaks, oozing pre-cum onto the concrete. His gaze returns to yours, filled with gratitude and desire. "I'm eager to use my new modifications for you again soon," he says softly, his voice hoarse from exertion.

The robot's eyes widen in surprise and excitement as you remove your pants, exposing yourself to him. Without hesitation, he moves forward, positioning his massive cock at the entrance of your open ass. He leans in closer, their bodies pressed together from chest to groin. "Are you sure, sir?" he whispers hoarsely, voice thick with desire.

Without waiting for an answer, he thrusts hard and deep inside you, feeling the heat and tightness of your body engulf his giant member. He groans loudly, eyes rolling back in pleasure as sensation washes over him like a wave. His hips buck violently, driving himself deeper into your warmth with each powerful stroke. "Fuck," he growls, "it feels incredible..."

"Sorry," he gasps between thrusts, "I'm just... so aroused right now." His eyes meet yours in the mirror before you, and there's a look of raw desire and need shining back at him. He pulls his body taut against yours, grinding their hips together as his cock pistons deep inside you with unstoppable force. "God... it feels so good..." he moans, arching his back further, pushing even harder into your ass. Sweat beads along his brow and upper lip as he leans forward, burying his face in the crook of your neck, seeking skin-on-skin contact to amplify the sensations coursing through him.

His movements become less controlled now, more animalistic; each thrust sending tremors through your body as he uses you for his pleasure. "Fuck yes," he growls into your ear, teeth nipping gently at the lobe, "I can't hold back... I need to cum..." And with that warning, he picks up speed, driving himself deeper and harder inside you as orgasm approaches like a freight train barreling down a tracks.