Mark's Toy - By Skarth
(edited by Kusaragi)

(Insert Standard disclaimer here) Must be over 18, yadda-yadda, if you are underage backspace/Ctrl(Command)+W No complaining about physics logic, pain etc. Story by Skarth Edited by Kusaragi. Characters Copywrite their owners. 

And enjoy the smut. 

Skarth grins toothily at the large Doberman below him. "Lets get this going then..." The Manadragon settles himself down next to mark, and pulls out a two sets of handcuffs, one latching around both of Mark's wrists, and another for his legs.
He pulls mark down to the floor, laying on his back, setting one paw on his belly and rubbing it around, then traveling lower to rub over his groin,

As the dobermans shaft begins to push free, Skarth continues to rub and stroke over the swelling organ, watching as it grows in length and girth, listening to the short moans and panting as Mark's excitement grows. As the shaft reaches to it's full size, he grips one paw around the knot on the base, stroking it, encouraging it to it's full size as streams of pre trickle down the smooth veiny surface of his shaft.

Skarth pulls out two objects at once, one a bottle of lube, another, a thick dog cock dildo, anatomically correct and almost an identical copy of Mark's shaft in girth and length, even mimicking his large knot. Rubbing up and down the shaft Skarth lubes up that dildo with ease, and then leans over to dip one claw into the tip of Mark's pulsating meant, slipping it a few inches in as his urethra is spread over a few inches

Skarth dips in a second claw, and spreads the two digits apart, opening up Mark's urethra to the air as precum begins to trickle upwards through his shaft, spilling out over the thick cock meat, making the lube seem redundant.

Positioning the dildo to the head of Mark's shaft, about a foot long as is, Skarth begins to press the wide toy to his throbbing erection, easily pushing inside the stretched meat, and slipping inch by inch down into the core of his manhood, pushing deep into the urethra, as moments later Mark gasps as he sees all thats left is the knot sticking out of his bulging urethra's opening.

Skarth is not deterred. He presses the palm of his paw to the dildo, and forces his weight onto the toy, feeling the toy press tightly to the urethra and stretching it open  as wide as most fur's tailholes go. With a loud POP the knotted toy forces itself into your internal plumbing, pushing down deeper and deeper, as Skarth's paw follows the toy into the abused shaft.

Soon Skarth has his paw deep into the oozing meat, his forearm clearly visible down the length of cock and hand stretching out the huge knot from the inside, making it even bigger than usual, if not for your own apparent horniness. He pushes a bit further, the toy pushing beyond Mark's groin,  and he whimpers as he feels the tip nudging something deep inside, forcing something open that should be a one-way exit.

Mark grits his teeth as the unusual feeling spreads. The opening to his bladder is pushed open from the wrong direction, the tip of the dildo pushing inside, a momentary feeling of needing to pee, but feeling wrong in every way, but somehow, feeling good. Like a cross between constant relief and pressure, your shaft only twitches and convulses all the move as more of the dildo invades deepest plumbing. Soon there is a visible bulge on his groin, below the belly, but above Mark's cock, the dildo pushing through the soft insides and bulging skin to show itself to the world.

Skarth feeds more and more of the dildo into Mark's Bladder and soon there seems to be something blocking the way. Again Skarth will not be denied the joy of stretching out his new 'toy" and he gives a few short pushes and jerks on it, as it seem to be lodged, stuck in position*

The thought of the knot only flashes briefly in your mind, before he pulls his paw partway back out of Mark's distended shaft, and then gives a mighty shove using all his body weight pressing down on the toy.

Mark howls out and thrashes as the knot, over 5 inches thick, is forced to go through a tiny tiny hole deep inside his being, the shock of it courses through him, his tail shoots straight out bristling and back arches. His confused body doesn't know if it's pain or pleasure as it's simply to intense to describe, as his bladder is invaded by the huge toy.

Mark shudders and writhes for a short while, the evidence of his knotted bladder clear in his lower belly. Skarth reaches up with one hand and rubs slowly over that spot, stimulating the dildo through fur and flesh, Mark's body quivering in near orgasmic throes as Skarth tugs and pulls on the toy with the other paw in his bladders opening, letting nothing in, and nothing out.

Slowly, he pulls his paw out from Mark's stretched and drooling shaft, shaking off the precum that's soaked his arm, the shaft still erect as ever, and probably bigger than before as he can't remember ever being this hard before.