You pick through the pills with some trepidation, then make a somewhat disgusted face as you finally come up with a somewhat unhealthy-looking pill, it's colored side a very dark purple hue split by that ubiquitous pink stripe. You rather hope that this pill (which, you note, is slightly misshapen to boot), won't do anything. But of course, for all you know, it might kill you.
"C'mon," Your girlfriend goads you, an impish grin crossing her cheeks. You should have known she was dangerous when she told you about her peculiar desires...but it's too late now. You close your eyes, tilt your head back, and swallow the pill whole.
At first, nothing really happens. After several moments, you open one eye.
"Am I dead yet?"
Your girlfriend laughs, "Doesn't look like it, no. Of course," she continues, but you aren't paying attention anymore. You inhale deeply, feeling a rush of energy. Your thoughts begin to waiver, and you experience a startling sort of clarity, as though all the sensations of all your senses had been ignored until now. Your clothes are a rich texture against your body; the smell of a well-lived home wafts through your nostrils; you see your girlfriend in a bright lucidity; you can even taste her.
She blinks, and her voice waivers, your ears picking up the beautiful little fluctuations with amazing accuracy, "Are... you okay?"
You smile and step forward, sweeping her up in your arms, as a fiery need takes hold, "Never better," You smile, feeling self-assured, more...virile. She gasps a little as you pick her up, "Wait, what are you doing?"
You just smile, carrying her effortlessly into the dark bedroom, "You'll see." You gently place her on the bed, and close the door behind you.
In the darkened room, you reach fever pace within seconds. Foreplay is almost forgotten as you hungrily rip at her clothes, little shrieks and moans greeting every motion as you grope and lick at her in the shadows. You finally expose the object of your conquest, and drop your own briefs, mounting her.
It's good; better than you ever remember it being, better than you'd ever imagined. Each thrust is wonderful, and drives your need steeper. You grip her leg with one clawed hand, hips pounding against hers. Your abrupt actions are not without a little pain, but it merely heightens the already absurd pleasure coursing through you. Judging from your girlfriend's gasps and squirming, she feels the same way.
Your need consumes you, and you become oblivious to everything outside of thrusting and the intent of filling your girlfriend. Your pre is voluminous, soaking the bed sheets, rapidly filling your girlfriend's sex as it pours from multiple orifices.
Your mindless spree ceases as you finally orgasm, your other paw held tight to her stomach so you can feel the bulge of your seed. You mrr and collapse on top of your panting girlfriend, larger form laying over her. Your mind stays blank for what must be full minutes afterward, as the afterglow leaves you in heavenly obtuseness. You finally turn your head, and even in the darkness, your improved eyesight catches your image in the vanity mirror next to the bed. You freeze stock still.
The image in the bedside mirror makes you stare, astonished. Your body, in its lustful gyrations, has changed...