It's time to refine your natural cum-slut tendencies into something truly useful. I want you to become a pass-around bitch - a real gang-bang slut that can handle multiple loads at a time without spilling so much as a drop. For this training exercise, I want you to save up 10 of your own ejaculations in a plastic container. Put them in the freezer for freshness until you have all of them collected. Then, defrost the sperm. Use a large syringe to suck up the goo. Then, lube up your ass, stick in the nozzle, and inject all 10 loads into your tight little asshole. Quite a feeling, isn't it, feeling all that cum rush inside the depths of your belly. Now remove the syringe. Clench your ass! The trick is to keep all the cum up inside you. Don't release it. Hold it there for me. Now, I want you to stroke your dick. Play with yourself according to my instructions. It will take considerable concentration for you to cum on command while keeping all that spunk in your dirty-bird ass. Can you make it to the end without disappointing me? When I finally allow you to orgasm, I want you to catch your fresh hot semen in your cum-cup and knock it back like a shot. You love feeling used, don't you. You love being completely stuffed full of cum, from top to bottom. You'll make a fine pass-around toy for my bevy of studs.