"You see Bill, I'm tired of throwing myself at you. For five and a half months I did everything I could to show you that we would be perfect together, but you still didn't want me. Now I know that you weren't worth the effort. I'll be happier on my own, but before I go, I've decided to take a... small part of you with me. I've been carefully planning this little rendezvous around my menstrual cycle to guarantee peak fertility, and I can assure you that I'm regular as clockwork. I'm going to tease you into spurting a baby into me, Bill, and then I'll use my child support money from my high-powered lawyer baby daddy to provide a comfortable life for myself and our child."
With that, she calmly began to strip off her clothes. Her body was just as attractive as he'd thought, but as more and more of her soft, pale skin came into view, he became more and more determined not to give her what she wanted. There was no doubt in his mind that he could resist her charms. He was fully in control of himself.
"Oh, and I know that you'll probably try to resist cumming in my little pussy, so I've taken the liberty of mixing the poison with a mild aphrodisiac, similar to ecstasy. It will make it a bit harder for you to think straight, while also greatly magnifying your sense of touch."
Ok, that was worrisome, but still not insurmountable. As she pulled off her bra, however, he found his attention drawn to her heavy breasts, which were so pleasant to look at, but so dangerous, especially in his current state of heightened susceptibility to sensation. As primed for sex as Kara was, she was hyperaware of any sexual interest toward her on his part, and she quickly noticed where his glance had fallen. She grinned evilly and began to sway her tits from side to side, slowly walking toward his paralyzed body on the chair.
"Do you like these?" she asked, hefting them for him. "Of course you do. You men are always staring at them, imagining what it would feel like to grope them, to suckle on them like the big babies you are. Well, guess what? Today is your lucky day, because today I want you to fully appreciate just how sexy my big boobies are. I'll make sure that you enjoy their pillowy softness to your heart's content. I find it so odd that men fantasize about breasts so much, especially when they play practically no part in mating itself, but at this point that's irrelevant. By sexualizing them, you've given them the power to sexualize you too."
When she finally reached him, she leaned forward and teased her puffy nipples back and forth across his lips, leaving pleasant tingles in their wake as she filled his hungry eyes with a generous helping of her creamy mounds. He tried to look away, but her tempting tits continued to dominate his peripheral vision. He knew that she was right: his eyes were drawn to her chest like moths to the flame. It was too late anyway, since he could already feel himself becoming physically aroused against his will by her flirty display.
Physical arousal in the human male - the process by which the spongy tissue inside the penis becomes engorged with blood and swells, cutting off bladder access to the urethra and opening access to the vas deferens to allow for the transfer of semen - is a reflex, and is completely uncontrollable. Bill felt the familiar sensations associated with this involuntary process currently taking place within his own body, and as Kara bent over and began to lightly caress his hypersensitive penis with the tip of her forefinger, his neurons sent signals to his parasympathetic nervous system to prepare for mating. His penis began to stiffen despite his protestations, too interested in the promises of pleasure hinted at by Kara's naked body to resist, especially since the sensation of each stroke was greatly augmented by the effects of the aphrodisiac she had given him.
She sank to her knees, and, after rubbing her soft tits up and down his growing cock a few times, leaned over and licked him from base to tip with her slick tongue, causing him to stiffen even further, before taking him fully into her mouth and giving his dick the soft, wet friction that it craved. As she began to tease his sensitive frenulum, he felt a growing urge to flex his muscles and feel his dick twitch against her textured tongue.
Ejaculation in the human male is a reflex just like arousal, but while arousal is easily triggered by even the thought of sexual activity, ejaculation requires repeated stimulation of the penis while the PC muscles at the base of the shaft are flexed. If the penis is rewarded with stimulation during and after this flexing, semen is drawn up to the base of the shaft and the penis inexorably inches closer to triggering the ejaculation reflex.
This intermittent flexing, which takes the form of the well-known "dick twitch" or "throb", is the only part of the process the male has any measure of control over. Flexing the penis was kind of like breathing - automatic if you're not thinking about it, but controllable if you are, to a limited extent. It's just such a tempting and pleasurable sensation that it's hard to resist the urge. And, it was also like breathing in that the longer you resisted, the more and more the need to give in to the instinct builds.
In short, Bill knew that as long as he kept the muscles in his torso relaxed, and didn't give in to the temptation to let his cock twitch, he'd be safe. If, on the other hand, he embraced this urge, and repeatedly allowed himself that pleasant stiffening sensation inside of her, she would quickly trigger his ejaculation reflex, and all would be lost. It didn't help that her body was specifically designed to tease his cock into twitching, of course, but you take what you can get.
He continued to remain calm, practicing meditative tactics to help keep his composure, and ignoring the stimulation his aphrodisiac-addled cock was receiving from Kara's hands and mouth. So far so good.
His physical arousal was still involuntary, however, and her nimble tongue soon had him fully erect. Sensing his readiness, Kara stopped her ministrations and stood back up, leaning forward and burying his face in her soft, delightful cleavage as she eagerly prepared to mount him. Her fertile body was also at peak arousal, excited by the sight of his stiff manhood and her anticipation of the mating that was about to occur. She kissed his unresponsive lips, and slowly began to lower her unprotected pussy onto his penis.
His eyes widened as his dick began to slide between her slick labia, and in response she put a finger to his lips and shushed him. "Shh, don't worry. Mama Kara is going to take good care of you. She's going to make you feel so good. You want to feel good, don't you?"
Whether Bill wanted to feel good or not, his body clearly did, and as he felt himself sliding so easily into her tight entrance, his self-control slipped for a second. He felt his shaft tighten and his balls lift as his cock throbbed pleasurably inside her, and he knew that he had taken his first step toward involuntary release.
He also knew that he needed to be especially careful now, and not just because it had felt so good that he wanted to do it again. After a few such twitches, enough ejaculate would build up at the base of his penis that he would begin to leak pre-cum, which, contrary to popular belief, contained a small amount of semen and could accidentally impregnate the very willing Kara.
His initial failure to keep his cock from twitching drove him to redouble his efforts, and he was happy to see that he was able to keep himself in check as she began to slide her slick pussy up and down his sensitive cock.
It was working. He was winning!
But then Kara began to speak, and her sweet, flirty voice sliced through his attempts to ignore her.
"Silly boy, you're so tense! Don't worry, I was lying about my cycle being regular. In fact, it's probably off this month. You're free to enjoy my sexy body as much as you like. It's perfectly safe," she cajoled as she rubbed her soft, pillowy breasts against his face.
