Ross and Aiden: Balls to the Wall
That said, this story involves a lot of the male physical form with an emphasis on genitals, particularly with them being hyper-endowed, enormous muscles and the rapid growth of said muscles, an extreme amount of semen (cum) and the entrance of an individual
Max and Myles: Chapter 1 - The Beginning
Max slide the huskies entire length into his muzzle to keep his knot from getting trapped in his sheath from its rapid growth. myles gave a quick buck with his hips.
OmniGro
He figured he could make a gel similar to metagro that, when rubbed into the soft tissue of the body, could spur rapid growth in that region.
The Lessons of Love
Everything on his son looked bigger and bulkier, as if he had gone through a rapid growth spurt. "d-dadddddyyyy!!!" his son wheezed out through clenched teeth. arlen held his cub closer, determined to protect him through this monumental event.
The cold mistress' path - Chapter one - A cold reception: Welcome to the real world.
She's actually about three months old, and already full size (thanks to my excessively feeding her melinberry to fuel her rapid growth(she was still growing too.
Complicated love Chapter 2
The hogules were still blind to her rapid growth, but they wouldn't remain so for long. she could also eat meat now. one day, while i was over visiting, i realized that she was a very strange colour for a cat. orange with black stripes.
Berserker Battalion
What had already seemed like rapid growth only intensified. dallon shivered as a bushy, rugged brown beard tickled its way down his throat until it began to brush his collar bone.
Let's All Get Buzzed
Pulsating eagerly, the force of rapid growth in his ass tore the back of his pants, anus dripping a bizarre sticky fluid the likes of which could not have been produced by a human.
Beefed Up
The surface taught and bouncy- and thanks to the rapid growth; extremely warm to the touch.
Wyraach Initiation - Hyper Dragontaur TF
Hemos blinked, watching the human continue his rapid growth, his form expanding over the side of the bed. part of it was dangling around the side of the lava pit. "you're telling me...this is just nuts!"
Stud Farm (Trade with Foulfrost)
Dee knew himself that such a rapid growth, even in the course of a month was nothing if not impossible. his once almost twiggy body was now a massively spread field of muscles and he had to admit he didn't really care.
College Years; Chapter 1 - In the South
The tiger's monstrous physical strength, their rapid growth and physical maturation made them a deadly threat to the survival of the other species, which had thus used technology to counter muscles.