Sexual experimentation

As the capsule releases you, two huge guards grab you. They lead you to an all white room, containing only a single chair with (ohh fuck!) more needles and a giant dildo and ass plug. They strap you in tight, making sure the plug and dildo are deep inside you, then leave the room. A voice on the intercom explains that you are to be changed to fit whatever group you have been chosen for, unless of course you become a control, in which case you won't change at all. The needles push into your body, and you are wracked with pain for the next several minutes as the fluids pump into you. Then it stops, and you gasp for breath. You don't feel like your changing, so maybe you are a control. Or maybe it hasn't kicked in yet.