Jake grunted in shock as the tingling centered on a new location. "Huh? My butt!?!" He shouted.
The boy felt the urge from before, and hurriedly shed clothing, and tried to stare at his own backside.
Jake groaned as the growth took root, and slightly above his ass, a new lump formed. But it wasn't like the other three, for one thing it was much larger, about as big around as Jake's arm.
And like a fountain of flesh, Jake's new cock grew... and grew... and grew.
The adolescent whimpered as he continually had to adjust his stance to account for the new weight at the end of his spine.
Moments pass, and Jake looks fearfully over his shoulder the see the effects.
Sprouting out from the base of Jake's spine was a long tail-like appendage. About as thick as Jake's arm, and twice as long as his torso. But the most striking thing about it, was the fact that it looked for all the world like an overgrown dick.
Jake stared in horror at his new tail. "Oh god." He whispered to himself, as his new cock twitched and flexed on the ground.
And he thought himself a freak before, when he only had such simple mutations.
Jake curled up, resting his face in his arms, and his new tail coiling around himself protectively.
"What do I do now?"