Pleasure and pain.

"Testing default sensitivity setting now," The old man says loudly, more for the dictaphone's benefit than your own. "Please describe thie sensation."

You feel the light touch of a finger stroke your skin, first along your forearm and then on your inner thigh. The caress tickles slightly, especially on the thigh, but is broadly what you might have expected the feeling to be in your original human body. It occurs to you this old man must be a genius. You have seen artificial limbs on the news and had seen them covered with flesh coloured latex that looked like skin, but a sense of touch in an artificial limb is not something you have heard of.

"Yeah, I can feel that," You relate to the scientist. "A finger, right? Feels pretty much the same as normal I guess. Same as before if someone touched me."

"Ah good, baseline setting seems analogous to average human tactile sensitivity." The inventor records. "And how about this?"

Another touch, but this time not on a mere patch of skin. The man's hands are out of your sight so it comes as a surprise as you feel one of the erect nipples you had seen on the monitor lightly stroked. This touch is much more ticklish and you can even feel the movement of the stiff nub as his finger presses against it. After a few soft strokes of his finger and again without warning the nipple is lightly pinched.

"Hey! Don't touch me there you perv, that really tickles." You protest at the first touch. Though you feel embaressed it does feel quite pleasant, at least until the nipple is pinched. "Oww, what the hell. That hurts a little bit."

"Excellent, the increase in receptor density in more intimate gives heightened response just as expected." The findings are recorded. "Differentation between fine and harsh touch also seems to be well defined. Increasing sensitivity to maximum."

Another caress of a finger along the inside of your thigh, but this time the touch is intensely pleasurable. Though you don't have breath you still utter the sound of a pleased sigh as the synthetic skin is stroked and feel a sense of regret when the touch ends. That regret ends as a nipple is teased again and this time you respond with an audible moan that you cannot contain. The light touch is intense and very definitely sexually stimulating in nature.

"Oh god, please stop," You beg. "That ain't right, it feels so good." Your voice is still emotionless and robotic, but contrasting emotions are saturating your mind. Shame and anger at a man's touch feeling so good to you, but also intense pleasure and the desire for the caresses to continue.

"Aghhhh! Motherfucker! No, no stop." You would have screamed out, but the words come out as the same deadpan monotone as the nipple is lightly pinched a second time.

The pain is excruciating, though you realise all he has done is pinch the artificial teat between thumb and finger and the man hardly looks like he would have even average strength in his hands. To your infuriation and further impotent anger the old man chuckles and seems exceptionally pleased by your anguished response.

"Why the fuck would you do that?" You ask, the pain instantly vanishing once the pressure of his fingers releases. "That really fucking hurt."

"Oh, yes it would. Or so I imagine." The scientist responds with notably lack of concern. "It was one of the most strident requests of the individual providing the finance. I suppose prospective purchasers of production models will have varied uses for the synthetics, some of them less than wholesome. I don't really bother myself with the whys to be honest and concentrate on the engineering and programming of how to achieve the desired effect."

"Someone else is paying for all of this?" You question him. "Who?"

"Hmmm, yes," The old man answers you, he seems distracted as he fiddles with the smartphone. Hopefully reducing your sensitivity back down to normal. "I really don't have any interest in the business side of this. Certainly no interest in all the details necessary to establish a production line and retail. The cost of the research and developement was way beyond my means anyway."

"Who?" The man seems to pay more attention to you for a moment and realise that he has been answering your questions without censoring himself. "Ah well you will meet him shortly so he can introduce himself if he sees fit."