If It Isn't Broken
The way your penis transformed already shows you this, because essentially this entire penis is what used to be exclusively the skin under your foreskin. basically the sensitivity of your glans and corona, except now your entire penis is that.
The Beastmaker's Bed
She learned that she'd underestimated the implications of the kirin's 'both and neither' gender, when korlin's cock transformed into a dripping-wet pussy before her eyes.
High School is Hell - Obscure
Warning: this story involves cock transformation.
Genes And Wieners
Marcy has no hands to masturbate with, and dennis's dick transformed into a pussy, so he could not fully get himself off without something to penetrate him. they were unintentionally the solution to one another's 'problems'.
The Beastmaker's Bed
She learned that she'd underestimated the implications of the kirin's 'both and neither' gender, when korlin's cock transformed into a dripping-wet pussy before her eyes.
A Lurking Monster
The sight made her drool, and she had to resist the impulse to drop to her knees and suck on it - tempting though it was, she just didn't know how close he was to cumming, and having that pleasantly-thick shaft transform into two horse-sized rods inside her
The Vengeance of the Dragon King II: Drake Dominance
Contains: cock transformation, ass transformation, heavy watersports, petplay (cockpetplay?), using transformed body parts for sexy times.
High School is Hell - Deception
Be warned: this story contains cock transformation! if that doesn't deter you, then hope you enjoy the adventures of dante and flash as they realize that not all the demons that they've created are bad.