Small Bottoms

The injection burned cold, then warm, spreading through your groin in a slow, heavy wave. Your cock twitched hard under the robe as the serum settled. Kylie received hers with only a soft sigh, her thick soft cock giving a visible pulse between her thighs.

Dr. Glasscock disposed of the syringes and gestured toward a side door. “Informational component. This way.”

You were led into a small, dimly lit TV room with two reclining chairs facing a large screen. The door sealed behind you. Soft pink and lavender light filled the space as the video began.

The footage was slow, looping, and relentlessly focused. Close-ups of two cocks side by side—one thicker, one smaller. Feminine and masculine hands measuring, weighing, comparing. A calm, almost clinical female voice narrated over the images:

When in a sexual relationship with a trans woman, it is important to remember that you should compare cocks often…

The smaller penis is the bottom…

Size determines role…

The smaller cock submits…

Compare. Accept. Submit.

Intercut with the comparisons were lingering shots of the smaller cock being stroked, kissed, locked, or ignored while the larger one received attention. Every few seconds the screen flashed a clean graphic:

SMALLER = BOTTOM

Your cock strained under the robe. The serum made every pulse feel sharper, more sensitive. Kylie watched the screen with parted lips, her own thick cock visibly swelling. The messages repeated, layered, sinking deeper until the video finally faded to black.

Dr. Glasscock’s voice came over a speaker. “Session complete for tonight. Return to your villa. Rest. The serum will continue working.”

The walk back felt hazy. Kylie stayed close, her arm brushing yours, the heavy swing of her cock under the short robe impossible to ignore. Inside the villa the ocean stretched dark beyond the glass. You both dropped the robes. Kylie stretched, completely unselfconscious, her thick soft cock hanging heavily between her freckled thighs.

“I’m still sticky from earlier,” you muttered, voice rough.

“Go ahead and shower,” she said. “I’ll wait.”

You stepped into the clear glass enclosure and turned the water on. The heat felt good against your skin, but your cock stayed stubbornly hard, the serum and the video’s words looping in your head. Compare. The smaller penis is the bottom.

When you finished and stepped out, Kylie was sitting on the edge of the California King, still naked, legs loosely spread. She looked up at you with a soft, expectant smile.

“Come here,” she said. “Let’s finally compare.”

Your heart hammered. You walked over until you stood between her knees. She reached out, wrapped warm fingers around your cock, and stroked it once, slow and deliberate, bringing it to full hardness. Then she lifted her own thick cock with her other hand and pressed the two of them together, side by side.

The difference was immediate and undeniable.

Hers was longer. Thicker. Even soft it had looked substantial; hard, it clearly outmatched you. The head of your cock didn’t even reach as far as the ridge of hers. Her fingers easily circled both shafts at once with room to spare around yours.

Kylie looked down at the comparison, then up at your face. A slow, delighted smile spread across her freckled features.

“Oh,” she said softly. “You’re smaller.”

The words hit like a physical stroke. Your cock twitched hard against hers, leaking a clear bead of precum that smeared across her shaft. Heat flooded your face and chest.

Kylie gave both cocks another slow, simultaneous stroke, keeping them pressed together so you couldn’t look away from the size difference.

“The video was right,” she murmured. “Smaller penis is the bottom.” She leaned in, lips brushing your ear. “That means you’re my bottom slut now. Doesn’t it?”

Your throat worked. The serum made every nerve feel raw and hungry. You nodded before you could stop yourself.

“Say it,” she whispered, still stroking both of you together, her thicker cock dominating the visual.

“I’m… I’m the bottom,” you managed, voice rough. “I’m your bottom slut.”

Kylie’s smile turned filthy and affectionate at the same time. She released your cock, gave her own a slow, heavy stroke, then cupped your balls with her free hand and squeezed gently.

“Good boy,” she said. “On your knees. I want my smaller-cocked bottom slut to show me how well he can worship something bigger.”

You dropped to your knees on the soft rug between her spread thighs. Her thick cock bobbed in front of your face, flushed and heavy, the head already shiny. The scent of her skin and the residual soap from the earlier shower filled your nose. Behind you the ocean murmured against the shore. In front of you Kylie leaned back on her hands, freckled body open and waiting, eyes dark with the same heat the serum had planted in both of you.

“Go on,” she said softly. “Show me what a good bottom slut does with a bigger cock.”

You leaned in, lips parting, and took the head of her thicker cock into your mouth. The weight of it on your tongue, the way it stretched your lips more than your own ever could, sent a fresh wave of heat and humiliation and need straight through your smaller, leaking cock as it hung untouched between your thighs.

Kylie sighed above you, one hand sliding into your hair, and the night truly began.