One for the Price of Three (SynTech)
The bull terrier's arm flexed above while the dalmatian's moved below, swinging up to stroke across the three sets of abdominal muscles heaving and flexing as they squeezed ever closer together.
Party Foul
The canine arousal throbbed, half-hard, several feet of contoured, flexing maleness bigger than both of luvian's paws put together.
The Whimper Club
His spine straightened and his whole body flexed upwards as the enormous tubes of maleness stretched him.
Freebies Vol. 56: Spring Break Edition!
The cheetah's sleek yellow body flexed as shi walked over to the other two. terrance grinned and gave darren a peck on the cheek before dropping to hir knees between them.
Santa's Hulking Helper - 3
His body couldn't move, only lurch and flex with each blast of his titanic fuckbeast. "mmmm!!! mmmmm!!! uuuughhh!!"
A Matter of Inches Eps. 1-8 (reupload)
The big stallion's brown body flexed forward, driving his cock in and out again.
Beast Among Beastmen (unfinished)
His pecs fought against said biceps, the straining causing them to flex and his thickened nipples leaking and spraying milk with each pulse of his body, all while they lay on his stomach.
It's Tough Living on a Farm
His arms flexed and bulged with tight, enormous muscles as his hands roamed his titanic shaft, his butt clenching as he thrust into his grip.
Bear in the woods
The bear gasped and panted again, flexing his chest harder, and then reached up to grab his growing cock.
Four Alarm Muscle
Massive pecs flexed as the fabric shredded, falling away to his waist. his abdominals bulged outwards, flexing and growing. the ridges between each was incredibly deep, perfectly outlined by his white chest and stomach fur.
Wolfpaw Inn
"flex for me." micha said. mike obeyed and flexed looking in the mirror.
Dragonpet: Dragonriders 6-2
Beroan's muzzle slid entirely off ailmer's flexing cock, subjecting his orgasmically sensitive cock to the chill night air. however, his tongue kept his shaft propped up with a lazy loop around the middle of his flexing shaft.