Without saying a word, Katherine began adjusting the recliner. She leaned it back as far as it would go, and she made sure the cushions supporting each of my ankles were spread as wide as the chair would allow.
Maneuvering behind me, Katherine commanded, "Lift your head." I quickly obeyed, and my vision was soon enveloped by a thick blindfold. My heart raced, and I tried to brace for the tickles that would surely come. Katherine lazily dragged her nails across my torso as she made her way to the foot of the recliner. Her nails eventually settled on the tops of my feet when she finally spoke up.
"We are going to try something different today," Katherine explained as she guided her nails up my legs. They were now fluttering around the tops of my knees, occasionally tickling the sides as well as underneath. The tickling was mild, but I still couldn't help myself to stop giggling. Katherine always seemed to know how to change the pace of her attack, constantly changing her timing and technique to keep my brain confused. One thing was becoming clear though, and I think I knew where this particular experiment was headed.
"Under normal experimental conditions, the subject would experience sensations all over his ticklish body..." Katherine began an all-out assault on my helpless form. She squeezed my thighs, prodded my hips, scratched at my belly, and kneaded my ribs and armpits, all in short succession. I busted out into hysterical laughter, unable to control myself. I twisted and pulled at my bonds, but I was no match for them.
"The effectiveness of different methods would also be tested..." Katherine announced as she planted a raspberry on the side of my belly. Several more followed in various spots, but she eventually honed in on my belly button. Kat knew my belly and belly button were my most ticklish spots. She also knew how raspberries were my absolute favorite kind of torture. After ten or so more raspberries and an adventurous tongue, Katherine stopped the enjoyable torture, and my silent laughter subsided.
"Yes, you've been an excellent subject thus far. And good subjects get rewarded," Katherine whispered in my ear as she gripped my shaft, surprising me. As she slowly handled me, my breathing settled down, and a single gasp escaped my lips. "But this gift doesn't come without a challenge..." I could almost sense the grin on Katherine's face as the plumes of that devious feather made contact with the underside of my cock. I giggled in surprise.
"Here's today's experiment. I have a timer set for 15 minutes. I'm going to use one feather, and only one feather, to tickle this cock of yours. If you cum before time expires, you're going to be in big trouble. However, should you outlast my methods, you'll win a prize..."
My thoughts were racing through my head. I really wanted to know what I was fighting for, but I recognized that losing this challenge would be just as enjoyable as winning. Being tickle tortured by Katherine instead of her machines was a rare treat that I looked forward to. Nonetheless, my competitive mindset overruled my submissive thoughts and I became focused on winning.
"I accept your challenge. I'm ready for your worst, whenever."
Katherine spoke up, "Starting the timer. Best of luck."
A feather made contact, and I soon realized...