(This is a custom clip and I can make one for you too! Just send me a DM!!) Stud dog, Rex, finally has a bitch to breed! A week before mating he is brought in to visit you, the veterinarian, for a final checkup, including his clean out ejaculation. You get him hard, talking dirty about emptying his balls leaving only the best sperm for his bitch. He’s finally ready. You grab the collection cone, slip it over his cock, gripping behind his knot, immediately he starts spurting cum. He keeps cumming the whole time as you alternate between squeezing his knot and give very short strokes between his knot and balls. Throughout, you comment how nice his cock is, his thick knot, heavy balls, how much he’s going to enjoy being deep in that bitch’s pussy, stretching her, balls slapping against her. You comment what a lucky bitch she is to take his knot, and that you wouldn’t mind being his bitch yourself. All the while, Rex keeps pumping his cum into the collection cone. You comment you’ve got his sperm, and you know he’s ready to breed, so today you’ll collect all three fractions, his entire load. Continue dirty talking about his cock, the bitch, and how much you like his cock a show big his load is. Finally, Rex’s balls are empty, and they’ll be right full for his bitch next week. You don’t need to save his sample this time, so you have a quick taste, comment how good it is, how Rex is a good boy, and send him on his way. Feel free to play with the cum if you’d like.