One last question

Having now ejaculated, my mind could once again concentrate and, as another fart formed in my gut, a question formed in my brain.

"I do have one more question if that's ok," I said, "something I'm just curious about."

"That's fine, Billy, there are no secrets between us now. What is it you'd like to know?"

"It's this," I said, pleasurably squeezing out my flatulence with satisfying resonance. "Is that just a side effect or deliberate? What's all the farting about?"

"A very good question, and something we've actually done quite a bit of research on," replied the doctor. "Allow me to explain.

"Firstly, I know from our surveillance footage that you have enjoyed the pleasure of penetrating Kirsty's anus. The rectum and buttocks are very much part of the human sexual apparatus. Did you know there are very few species whose flatulence is as audible as ours? In the right circumstances it actually serves as a signal to draw attention to that part of our bodies. Something of a mating call, if you like. Of course, over the years some cultures, including our own, have somewhat lost that connection, but even in Western culture there is something taboo, or rude, embarrassing or amusing about flatulence, and that's the biological reason why. Some people are deemed to have a so-called fart fetish, but let me tell you, those people are merely acting in proper accordance with human biology.

"Secondly - well, yes, initially we were merely focused on trying to create a **** to turn the human libido into something to overpower rational thought. The objective was admittedly sinister, to use it to induce powerful people into situations that would embarrass them and we could use as leverage for our own agenda. Increasing the sex drive alone wasn't enough: we needed to control who our targets were attracted to. We were targeting a cabinet minister, trying to get compromising footage of him with his secretary, but increasing their libidos simply meant they headed off to their respective partners and satisfied themselves there. So we worked on the other enhancements - making her breasts grow visibly in front of his eyes, giving him a jolly good tent in his trousers. At one point the farting was an unwanted side effect but we realised it served the dual purpose of drawing their attention to one another's sexual regions, and removing their inhibitions.

"Thirdly, we are always working on new exciting developments. One stand of our research is to develop both a version of this particular pharmaceutical that can be inhaled instead of swallowed as a pill, and on getting the body to produce the desired mix of chemicals in the gut - so that a person can have the desired effect on a victim by farting in their vicinity. So much easier than sneaking one of our pills into their food. Just imagine it - you spot a woman you like the look of, take one of our pills, sidle up to her and fart, and within minutes her breasts are growing and popping out of her clothes, her pussy is dripping wet and she's **** for your rock hard cock."

"You should pop by our lab some time and see some of our experiments in action. But first, let's get you properly signed up."