The Dr. returned to the lab: the strapped, squeezed, pulled and heat-agonized agp millie was sweating profusely. Her tits were crimson red, her whole crotch was red too. After reading his charts for a moment, the Dr. turned off the heat lamp under her nearly cooked twat. He donned thin insulated gloves, and smeared a heated lotion into her tortured pudenda. He rubbed it in vigorously, but as it cooled, it almost began to feel good. Then he reached for a handfull of shaved ice out of the nearby freezer and forcefully stuffed it into her widely stretched cunt. The cold was soothing at first, then cold, then painfully cold, then agonizingly cold. So cold that it took her mind off of her tightly strapped also-nearly-cooked breasts. While keeping the ice tight against her inner flesh: the Dr. removes the weights, dowel and clamps that had been stretching her poor pussy lips unmercifly. He finally pulled his ice-filled hand away, and turned his attentions to her aching globes. The Dr. pulled the temperature probe out of her left tit and switched off the heat lamp. He again applied the heated lotion, using both hands to roughly massage her tender boob. He paid particular attention to her nipple and areola, pinching and pulling with one hand while vigorously lotioning with the other. He worked quickly, repeating the procedure on her right breast as soon as he finished the left. Millie thought to herself; "He's gonna have a hard time covering her ample busoms with only a handfull of ice at a time." but then she saw ice water vat. He wheeled it over on a table and positioned it right in front of her. Releasing a catch at the back of the X-frame millie was strapped to, he tilted it (and her, of course) at the "waist" until her huge mammaries were completely submerged in the icy water. Again the feelings went from soothing, to cold, to painfully cold, to agonizingly cold alarmingly quickly. He left her there for what seemed like a very long time. However, her poor titties were finally turning numb, and the pain was subsiding. While still under water, the Dr. removed the leather straps constricting the base of each of her melon-sized hooters. He then tilted her back upright and left the lab. Poor millie was almost in tears, she had been strapped to the infernal X-frame for nearly 24 hours now, she hadn't shit or even pissed in that time. She knew he had given her something to slow both processes, but slow was the key word. She really had to GO! To her relief, the Dr. returned quite quickly. Without a word, he undid her ankles and then her wrist straps. Though her legs were somewhat wobbly from being strapped so wide for so long, she still managed to move quickly over to the stainless steel potty by the wall. She hardly noticed the cold steel seat on her bottom, nor was she fazed by the fact that the Dr. was watching and listening to her loudly evacuate both her bowels and her bladder into the thin-metal-walled toilet bowl. As she was relieving herself, a strange sensation started in her crotch. The rushing flow of her piss and the felling of her delay-hardened turd exitting her anus excited her. Apparently, the lotion he rubbed into her tits and sex acted somewhat like the injections he had given her on the second day of testing, as just the act of urination and defecation was making her sexually aroused. Even when she was wiping herself, it felt like she was about to cum. She had already wiped her pussy once, but pulled another wad of paper and began wiping it over and over; maybe "caressing" was more the word. The Doctor's loud "Ahem" brought millie back to her senses, so she stood and slowly wobbled over to the Dr. "I know you went through a lot for this test, millie; but I think you've already discovered the payoff. For the next 48 to 72 hours, the mere caressing of your breasts or genitals, even your anus for that matter; will bring you to orgasm. The only side effect is that the treatment also creates an intense desire for sex in the test subject." Poor millie already knew that was true, because the thing she wanted more than anything in the world at that moment was for the Doctor to have sex with her. The normally stern-faced Doctor had a little smile (or was it more of a smirk) as he unzipped his lab pants and pulled out his rapidly-growing member. Agp millies eyes sparkled, and without hesitation she knelt at his feet and took his dick into her mouth. She reached a hand under each of her still-cold breasts and pushed them up under his cock, so that his large-veined fuckrod rubbed her hypersensitive nipples each time he pumped his manhood in and out ïf her wet sucking mouth. It didn't take long for millie to cum. It was only the first one, but millie was really hoping that it wouldn't be the last; she had never felt anywhere near this horny before in her life.