Hot, stuffy darkness engulfed your world as you felt the trucker lean back into his seat, the titanic junk in front of you smashed into the bottom of the underwear as it finally settled into place. As awkward as the place you were in was, there was no way in hell you would get any closer to the massive penis laying atop even larger testicles. It was disgusting and with all other exits sealed shut, you were forced to endure the full duration of the drive.
After a couple of hours spent trying to get an ounce of sleep, you notice the steady rise in temperature radiating throughout the confines of the underwear. Your brow is already wet with sweat and so too it seems are the vast walls of flesh around you. The low hum and rumble of the truck are soothing, however, and you are eventually able to get some sleep listening to muffled country music from the truck's radio.
Your heavy eyes slowly open to the same musk and darkness as before but with a strange sense of vertigo. The gaps in between the threads of underwear were much larger than before, so much so you could almost squeeze through them. It was clear you had gotten smaller but when you looked back up, the true weight of your decision to stay put was crushing. The man's dormant junk was miles tall, every detail and small sound of the mammoth ballsack were as loud as they were revolting. From outside you hear the planetary trucker snoring, sometime during the night he had pulled into a motel and was fast asleep above. You know if you continue to stay in his underwear, you'll shrink to nothing so you are left with but one option.
Scaling the sack in front of you was no longer a trivial task, this climb could easily kill you if you fell or if the man simply rolled over in his sleep. Inches from the slick skin, you gingerly place a hand on it. The feeling under your fingertips is sickening but you must climb. Gripping small wrinkles you pull yourself up and begin your long ascent. There are enough wrinkles and imperfections in the flesh to make your climb simple enough, it would be an endurance climb more than anything. You come across your first hair about 30 minutes into the climb and use the large column as a checkpoint. Big enough that you couldn't even wrap your arms around it, the hair easily supported your tiny weight as you caught your breath. The air grew warmer and warmer the higher you got and the surrounding musk became more and more potent until you were practically choking on it. You resume your climb and after a couple of minutes, you begin to notice a large globular mass further up. The mass was slowly getting larger and larger until you realized it was actually getting closer and closer. You tried your hardest to avoid its trajectory but you were just too small. The ocean of liquid smashed into your frame, engulfing you in its center. You choking on a sputter, utterly trapped in its raging current. The taste is salty and you realize that if you don't escape soon, you'll drown in what is just a bead of ball sweat. The droplet smashes into the hair from earlier depositing you harshly onto its surface now drenched in the sweat. You throw up over the edge and collapse on the ground. The salt sweat left your dry mouth even more parched than before, now in desperate need of water, you restart your climb from square one.
After multiple hours of climbing you eventually reach the summit where the ground is walkable. Spongy flesh squishes with each step as you inch forward toward the penis head, now big enough to smother an entire city beneath its mass. The great canyon above radiates head and is somehow even darker than the outside. This climb would be much more difficult, vertical micro-wrinkles in the head were much harder to climb as you had to squeeze yourself between them to ascend. You reach the slit in only half an hour when you feel your body begin to shrink once more! Only slightly smaller than before, the difference is enough to render the rest of your climb impossible. The slippery walls of the penis slit kept you at bay, you were well and truly stuck staring into the black void in front of you.
You didn't know what compelled you to do it, perhaps your mind had been poisoned by the odor emanating off the man's junk or you had simply given up on life, but you started to wander deeper into the cavern ahead. The further you got, the less oxygen entered your lungs and the walls squeezed closer and closer together. You were so deep in the void that no light could enter, trapped in utter darkness, your tainted mind failed to feel the man rise out of bed and get ready for the day. All you feel is the endless horizontal road suddenly turning vertical. You fall for minutes deeper and deeper until the tight tunnel breaks away into a vast open chamber, your tiny screams echoing throughout its fleshy walls. Finally, your fall is broken. Landing in an incredibly viscous liquid, your broken body can float easily on the surface. Sounds of flowing liquid can be heard in every direction stretching infinitely into the abyss. One breath was all it took to know exactly where you were. Stranded in an ocean of cum, you are now trapped in an unaware stranger's testicle for what could very well be an eternity.
Your eternal prison speaks, however, as you feel a sudden jolt of commotion and movement of the man's balls, could this be your chance to escape? You brace for anything to happen as the man above begins to...
