Thickening
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> @Jawn_Mancer: Cum gets thicker with every nut.

So thick that you can hear it pumping up through your urethra, gurgling blorps as it surges through and finally splurches out, splattering with heavy thumps that echo through the hall.

The next shot sounds more like a heaving beast is letting out a deep growl as it rises up, your cock bulging out, stretching as your muscles contract desperately, the pressure from your nuts causing the mass to finally rush up far enough to come splorching out, a mass a thick as cement released, the recoil making you and your overfull sack slide backwards, the ropes hitting the ground cause it to outright break underneath them, leaving deep craters in their wake as they barely spread out at all.

The subsequent, ominous rumbling makes your stomach sink. A deep, terrifying rumble. Your breath accelerates. You want to run, but how could you get away from yourself. Your legs quiver on shaky ground. The contractions make your entire body convulse. The noises are so deep that you can see them radiating out as pressure waves. You hold your breath and you cling into your taut sack. Your pupils narrow and your teeth clench as it unleashes.

You can just barely get a glimpse of the rope's gravitational pull breaking up the crust and flinging the chunks up into the air toward the irresponsibly dense mass before the sound waves make your glasses crack.