Double R. Hood and B.B. Wolfe: Part 1
Obscenely big for his slim hips, his sheath stretched up past his navel. his jeans hugged it about halfway up and wrapped around his large balls even more tightly.
Scandalous Bastards!
A few gropes later, those pants (and grayson's too) came off, revealing a swelling sheath stretched to the limits of its capacity. by that time, the wolf's paw had found the fox's own sheath, stroking it vigorously.
Touch (Yourself) Typing: Freebies Vol. 60
Hir sheath stretched wide between hir hind legs and shi growled as hir knot filled out. the tight flesh of hir sheath wrapped around it tightly, squeezing on it, keeping the pressure up even as shi grew bigger.
Jeremy: Chapter Four: Brotherly Rivalry
His cock also thickened, he felt the skin around the opening of his sheath stretching tighter as it gave way to his ever growing girth. with every second of his growing erection it seemed to grow that much faster from his rising excitement.
Cody's Growing Pains - Chapter 6
Began licking over cody's cheeks and his mouth with that long tongue of his again as he slowed down his thrusts, slurping in his mouth until cody started softly suckling blue's tongue as he more slowly jiggled his cock along the inside of the boy's sheath, stretching
Charles n Tyler Part 1
It wasn't until he felt his blood start to flow into his sheath, stretching it thicker that he realised just how much. he knew that he should move away, make this person stop, but he was mesmerised by the calming actions on his ear.
Flesh
I shove his nose into the crux of my legs, where the hard lump of my sheath stretches against the fabric zipped around it. he whines at me and inhales through his nose, knowing my scent.
The Queer Couple: The Transformation
Finally, his sheath stretched open to let the large object out. it was a knot the size of a tennis ball. the goth growled, baring his teeth as his muzzle completed its transformation. the long, thin snout snapped itself together with an audible crunch.
Missing Fursons
The opening of his empty sheath stretched open wide, as his sheath shrank and twisted; his scrotum flattening, while that pelvic area widens, perfect for cradling a foal, his once proud stallion-hood all but gone completely.
Round Two
Maloo dropped to her knees as a swell of arousal forced her maleness out of its sheath, stretching out against the blanket wrapped around it.
Blackie and Zilla Have Fun!
As he remembered the chestnut's huge cock plunging through his anus, the thoroughbred stallion felt his sheath stretching slightly, followed by the pleasant feeling of his cockhead squeezing out of the opening, and his penis beginning to descend.
Skyler: impregnating in the club’s backroom
His growing sheath stretched his jeans and pressed against her skirt. - "mmmm, maybe we should finish somewhere more..." she licked his muzzle from with her long tongue, "...private." they walked paw in paw to one of the club's private rooms.