Hiccup's Revenge
Toothless nodded vigorously at this, fearing for his fragile sack, and making a mental note to shup up.
Mom's day off
Jenna pulled out for her much deserved breath once she felt the last shot travel from her shrunken sack down her gullet with one massive blast.
Unicorns
He snorted as the guy blushed, rubbing a fore-hoof along the white pony's nut-sack, noting it was a lot smaller than usual. 'you always got the client off first... idiot.'
A Force of Nature XI: Musky Rain
Then he howled, his hindlegs cradling his sack and squeezing as his body reached the breaking point.
Filly Game
At first he thought that his stallion was coming back for seconds, but once he spotted the spent horse nosing around the sack of oats, he realized it was his companion.
Good bye
Little john says placing the sack on the table. his mother gets surprised when she takes the sack and she opens it to see the money. "it is a lot of money." leanna says watching the inside of the sack.
Dog Daze [Sketch]
The twitching, pulsing tailhole, tugging up at the back of his hanging sack, paired with a glance over the feral’s shoulder that looked almost like a wink; a flick of the tongue over the chops, a subtle shift in body posture and stance; and then he sat down
Mirror Match
Garrett's swollen sack could attest to that first hand.
Renamon and Rika: Taming Guilmon
Her little nostrils were neatly clinging to his full sack. finally, when he shifted, she could breathe! her lungs kicked into overdrive, deeply inhaling that thick musk right underneath guilmons heavy sack.
Dreams coming true
Five minutes passed, then ten, and the cum continued to cum, each rope lessening the burden of his sack slightly, and as the cumshots rose in number, more and more and more, his sack slowly started to lift up, inch after inch after inch, once again returning
[p] Shadow Sounding, part 1
Rising shakily, he poked at his swollen, egg-laden sack and groaned.
World Editor III: Size does matter
He pondered on the notion, that even he wasn't ready for just how much mass, weight, heft he had, the strain of moving, the fullness of his sack.