"I told you that would be a rough one; but the test was necessary to set a baseline for your pain tolerance." the Doctor told the recovering agp millie. "While you were still unconcious, I entered the data from your test; and after you have recovered for a few more minutes, we will conduct the next test." Agp millie looked at the Dr. with a mixture of horror, fear and self pity; as the last test had hurt her breast SOOO bad. "As you know, a person's pain tolerance increases dramatically when they are sexually aroused. And through my research; I have found that by controlling the amounts and types of pain; especially when applied directly to the sensitive genitals and sexual areas, I can greatly increase sexual excitement." The Dr. then picked up the smallest syringe on the gurney, and quickly administered injections in each trembling, engorged nipple; then several in a ring around her nether hole, several in each of her outer pussy lips, several to the inner lips, and finally a larger injection directly into her sensitve clitoris. Even though the Dr. worked quickly, he took great pains to administer an exact dose each time, referring to a computer printout before each shot. By the time he was through with the last injection; agp millie began to feel the rising warmth at the injection sites. First in her nipples, of course; but soon the "heat" began ramping up in her crotch too. To her relief, the pain didn't seem to be escalating anywhere near as rapidly as the first time; in fact, the locations and nature of the stimulation was making her "hot" in another way altogether. Her trembling soon turned to a slow humping motion, at least to the extents that her restraints would allow. Her humping got faster, she looked over at the Doctor, hoping he would put his tool back in her, or at least touch her there. She would also give anything if he would just rub her nipples, or free her hands so she could. But these thoughts soon left her mind, as the "burning" in her nipples, asshole, cuntlips and clitty were driving her wild with sexual excitement. Her humping got more and more violent, her huge beautiful breasts swinging wildly in various directions across her chest. Her feminine juices flowing so copiously that they ran down her ass crack and dripped off her quivering, glistening buns. Then she started to scream; nearly as loud as before, but a very different kind of scream. Her scream was the result of the biggest, most stupendous and satisfying orgasm she had ever experienced. She certainly tested the integrity of the Doctor's restraints, as the throes of her orgasm had her straining with all her strength against them. When her ecstasy started to wane, the sensations in her tits, ass and pussy returned to her consiousness, and she started the air-humping and tit-shaking all over again, as another even stronger and more violent orgasm quickly built inside her to another screaming climax. This pattern went on for a full five minutes, slowing down in frequency and intensity near the end of that time, but agp millie experienced over thirty body convulsing orgasms in those five minutes. Even after the auto-orgasms stopped, her sexual arousal wasn't over: her nipples were still swollen and erect on her tits, and her twat lips were still wet, engorged and opened invitingly. The Doctor reached out and massaged her left nipple, this small amount of added stimulation pushed agp millie back over the edge again, giving her another body-shaking climax almost instantly. The Dr. played with her nipples for a while; first with his fingers, then licking and suckling. After massaging and licking her to several more cums, he began pinching and pulling on both of her hyper-sensitve nipples at once. Even this rough treatment only brought her to climax again and again. To continue the experiment, the Doctor pulled his hard cock out of his lab coat and slid it into agp millie's cunt in one swift thrust, as she was so open, wet and aroused. She orgasmed again, and continued to cum over and over as he slammed his big dick in and out of her. He then pulled his cock out of her cunt and jammed it balls-deep in her anus. Again, this new sexual assault to one of the sensitized areas brought her to another quick and thunderous orgasm. The Doctor fucked her butthole for several minutes, giving her another series of climaxes. The Doctor's excitement had been building too; the subjects beauty, her nakedness, her magnificent breasts, his utter control over her, his enthusiastic pumping of her cunt and anus, and her series of earth-shaking orgasm's had finally brought him to the edge. The Doctor slid his manhood out of her butt and walked around the apparatus and adjusted agp millie's head restraints so that her head bent back. Agp millie knew what he wanted, and eagerly opened her mouth wide for him. The Doctor then shoved his throbbing tool right down her throat, causing her to choke and gag. He enjoyed the sensations of her gagging and spasming throat on his dick. He left it there for a while, but finally relented; and pulled all but the head of his tool out of her throat. He then flooded agp millie's mouth with his hot sticky sperm, shooting gush after gush into her oral cavity. He squirted so much cum into her that she had to swallow to keep it from running out of the corners of her mouth. Even this sensation brought agp millie to climax again. When the Doctor's cock was fully drained, and licked completely clean by agp millie, the Dr started removing her restraints: "No more tests today?" asked a disappointed millie. "No," said the Doctor "but I will be back at 8:00 tomorrow morning." "Our next series of tests will target specific areas, and involve different methods of pain application, get plenty of rest tonight." Agp millie, pulled the coarse sack-cloth dress back over her, and almost came again as the rough material scraped her still-sensitive nipples. Suddenly, she was looking forward to returning to her cell in the test subject holding area, so she could play with herself. Apparently fifty deep soul-shaking orgasms weren't enough for her. She was also excited by the prospect of another sexy-pain session with the Dr. Tester on the morrow.