You walk over between the dragon's rear legs, the massive beast laying back and spreading them to allow you to closely examine his body. The scent of the massive, powerful monster is making you dizzy, a heavy and pungeant spicy scent of huge animal that activates some hidden part of your subconscious, making you feel more submissive and malleable.
Bulging at the dragon's crotch, warm and massive, is his light blue sack. You reach forward and touch it, feeling it pulse with heat and power as the balls within churn and produce his hot, creamy seed. The musk of his crotch soaks into your lungs and fills your mind, making you feel slow and needy.
"Do you like my balls, human? Mighty, are they not? Each drop of my seed is worth more than you would see in your life."
You gulp, feeling the power of the dragon's maleness throb through your hands, a hot pulsing of power that shakes your body and makes you feel weak and small by comparison.
"Do you wish to become one with them? Produce my seed, forevermore. You only need to nod."
You hesitate, trying to resist the urges growing within you. You don't want to be trapped in some huge lizard's sweaty sack for the rest of eternity. Do you?
Closing your eyes and grunting with shame and frustration, you realise you do. You nod.
The massive beast laughs, and in a swooping instant, you are picked up in his huge forepaw. His massive, wicked eyes glare into yours as he grins with victory.
"So be it! Your life force will make my semen stronger and more fertile. Go to your fate, human."
You are slowly lowered down, the dragon's huge cock drawing closer to your naked body. His slit opens up, and you feel your bare feet press against it, gradually squeezing inside the warm, tightly constricting darkness of the monster's manhood.
You shudder, naked and trapped inside the darkness of the dragon's ballsack, floating in a thick, sticky morass of slimy white cum. You see one of his balls, attached to his body by a long, fleshy string, but the other one seems to be missing, the string of flesh dangling freely in the pool of cum.
The string moves forward, suddenly sliding into your mouth and forcing itself like a tentacle down into your throat. You feel strange, your body changing as the flesh merges with you, changing you and making you a suitable vessel for the production of might dragon sperm. Finally, you shiver as your flesh is overwritten, and your cock hardens, suddenly squirting a thick load of cum that stinks powerfully of draconic essence. You are trapped forever in the dragon's dark balls, forced to cum eternally to refill his seed.