If Tails had to pick one word to describe his development once puberty started, it would be "hyperfocused".

Not only did it start a little early, but even a year later at age nine seemingly all of his developmental hormones had failed to reach most of his body and instead gone directly into his cock, and what a cock it was. Ten inches long and thick as his leg, it was an absolute behemoth on his two-foot-seven body, and when erect it wormed its way into his vision, bobbing and throbbing until he gave it what it wanted, rubbing and squeezing the oversized knot at its base.

Not to be left out, his balls had massively developed as well, his scrotum big as his fist and constantly producing sperm at frankly comical rates. The fuzzy orange sac bulged out most of the clothing Tails had started having to wear in public, and whenever he was aroused he could swear they were producing a scent that he couldn't quite describe, filling the room and arousing him further.

In fact, this was what he was dealing with now. Tails had tried to distract himself by tinkering with various bits and bobs, but focusing on the mechanics of intergalactic translators and solar-powered railguns could only keep a growing boy's attention for so long, what with the tip of his dick bouncing repeatedly against the bottom of the worktable and his overfilled balls slowly filling the workshop with that aphrodisiac scent.

First one hand slipped under the table, rubbing slowly against the hot, sensitive skin. "Mmph..." He moaned out, "Again? This is the fourth time today..."

His hand drifted up to the tip, where a large glob of pre had formed. A quick swipe over the head smeared it easily along the end of his shaft while his balls set to work forming more to work with.

"I'm gonna have to build something to make this easier," he thought aloud as he used his excessive production to use lubing up his cock. "Maybe some sort of tube I can put it in? Mmm, yeah, that sounds nice.. " the very thought of having something to shove his fat, throbbing meat into sent a pulse of pleasure down Tails' spine, punctuated by a forceful shot of pre against the bottom of his table.

His other hand slipped down to his balls, which filled the space between his thighs with ease. Gently squeezing and rubbing at them, he closed his eyes and continued his fantasies. "I could line it with something squishy and heatable, so it's warm, and – mmph! – m-maybe let it vibrate..."

His arm was traveling the whole length of his slicked-up cock now, his fingers serving to sell the image of what he may build when he was done. But as he stroked and added his second hand to work, his thoughts drifted further, his fantasies shifting from mechanical creations to the bodies of his friends. The prominent chest of Rouge, the mature curves of Vanilla. Images of Sonic comparing his own penis to Tails slipped in, and Shadow laying in wait for Tails to show him what he's got.

His hands started bumping against the knot at the base of his length, his climax soon approaching. Tails glided along his pre-soaked cock, the fur on his overworking balls matted down by the sheer quantity, as finally his mental image focused on Cream the Rabbit, the girl closest to his age. He pictured her riding his fat, juicy dick, her imaginary pussy tight as his grip.

With a final imaginary thrust, Tails' hands settled on his knot and gave it a squeeze, the sensitive nerves finally triggering his climax. He cried out in pleasure as his massive load fired from his cock, shot after thick, virile shot blasting from his tip against the wall behind his worktable. He writhed in pleasure as he at long last drained his heavy balls, his lengthy orgasm managing to last over a minute. By the time he was finished, he could feel a small puddle of his white cum against his feet, a powerful display his his absurd production.

"Hah...hah..." He panted, catching his breath. "...I think...I'll probably have to install something...to catch all the cum too..."

He glimpsed down under the table to look at the mess, but found his vision filled with still-hard red fox cock.

"...But I think I'll worry about that later."