The container of pills was meant for the endangered species program.
The pills contained rapid, self replicating, nanobots programmed to reconfigure human DNA into white rhino DNA. A specially formulated diet would include certain metal and silica oxides to provide the nanobots with building materials. Further, the nanobots would rebuild the subject’s body into a fully grown, completely healty, bull rhino within the next month. After that time, the nanobots would imbed themselves in the rhino bull’s feces and deactivate, to be passed out of the bull’s body.
The subject’s brain was to remain human. That was part of the agreed and stated portion of the contract. However, the portion that was not stated, but was agreed upon by signature, was that the subject’s brain would be altered in the manner necessary for successful integration of the subject into his new life. The portion of the brain that was responsible for sexual drive was to be reconfigured to match that of human males with Satyriasis. This reconfiguration was to be the first job of the nanobots upon reaching the brain. It was considered easier to repopulate a species if the breeding animals are cooperative. Further, the prisoner wouldn’t think about killing his human keepers if he was constantly thinking about sex with rhino cows.
The male prisoner, a serial killer, had been offered the opportunity because it would remove the burden on the tax payers, free up jail space, remove a dangerous man from society, give the man some of his freedom back and bring an almost extinct species back from the edge. All around, it was an agreeable solution to all parties concerned.
The perks were obvious to the prisoner, a life of nothing but sex and being well cared for, for the rest of his life, in a top notch zoo.
The doctor, realizing his mistake, sedates you. An excited volunteer doesn’t help the situation in the least. He makes a call to his boss, there’s going to be Hell to pay, but he’s sure everything will work out for the best, this sort of thing did happen last year. The doctor looks at the serial killer’s contract. There’s nothing in it that specifies gender. He goes to the lab, takes down a bottle containing nanobot pills programmed for rhino cow and gives them to the nurse to give to the killer. The rhino cow will, have a human brain configured for nymphomania.
“At least he’ll have a mate to occupy his time.” The doctor says, thinking about you and how badly he screwed up.
When you wake, you have the overpowering urge to masturbate. You're naked in a barred cell. You don't care that someone might walk in and catch you. You look over in the corner, there's a large man in the room with you. The burly bearded fellow is also masturbating. Something about his smell attracts you. You achieve orgasm and this allows you to move over to him. As you rise from the ground, you notice that you seem to be getting more muscular. You're thoughts of why you're putting on bulk are distracted by the big man in the corner, jacking off. There's just something about him that interests you. Finally, you make the connection and you recognize him! He's been in all the papers. He is the sirial killer that died of a heart attack last week!
The man looks up at you after he achieves orgasm and says, "Welcome to my herd! Feel free to clean my come off of my chest." He laughs very cruelly. "The Doc says he was making a mate for me and you must be my mate!"
He laughs again, but neither of you can possibly know that it is he who will be a member of your herd.