K and P

"OK I've marked all your papers on the test about microscopes. As usual most of you got some wrong answers and some correct ones, but you didn't all make exactly the same mistakes or give exactly the same answers ..... except of course K and P! Word for word the same, same mistakes, same mis-spellings, and both of them think a microscope is for looking at 'Micro Orgasms' ......" The class erupted into shrieks of laughter and looks of surprise were directed at K and P, who looked suitably embarrassed.
"So after lessons today I would like you two to attend for a short re-test where I can give you each different tasks and questions so that I can re-asses your grades for this work."
"But Sir ! We've got netball practise at 4.30 ...." pleaded K.
"That's OK .... I won't keep you long, and I will explain to your netball coach if it's needed."
At 4 o'clock they both arrived, and they had changed into their netball things already! Short skirts, thigh hugging shorts and shirts that were quite tight, not yet covered by their playing bibs. A ploy I suspect to maybe soften me up for the re-test. It worked!
"Please Sir," teased K, "What sort of test is this going to be? Oral, visual, vocal, practical, physical ?"
"Sexual !" I answered, "and educational of course. You will firstly obtain some fresh male sperm and then view the result under the microscope, I've placed one each for you on the table, there's a culture dish to catch the semen and slides to smear with whatever you cum up with ..... a very real and relevant 'Micro Orgasm' for you to work with. The semen needs to be freshly produced, and the only way to do that is to make your donor sexually aroused, and the best way to do that is to work topless." With that I began to remove my trousers and shorts and sat down on a chair while they took off their tops and sports bras, giving each other looks that said 'This is going to be fun ....'
"I think I'd like K to be the one who makes me hard and makes me cum, and P can make sure she catches it all in the dish, after, that is, she has given me her tits to eat and a handful of pussy to rouse those sleeping sperms ready to shoot out for you both. Hmmm let's do it girls .... let's be naughty and nasty .... titty fucks and finger fucks .... wanking and sucking ..... kneel between my legs K and stand by my side P ..... mmmmmmmm"
As K began to play with my half hard cock, my hands explored under P's skirt. The smooth material of her shorts and the roundness of her bum felt erotic, then the bare skin of her thighs excited my other hand to reach up and touch her covered mound ..... but I wanted more than that, I wanted to touch nakedness. I was distracted then by K, she had made my cock hard and now her mouth took him in and made me shiver with bliss, only for her to pull him out and place him between her buxom breasts, he was coated in her saliva which helped him glide between them as she began to titty fuck him. My mind went back to P, my hands found the waistband of her shorts and slowly began to inch them down over her hips, peeling them down bringing with them her underpanties and soon they rested on her upper thighs making her fully exposed to my face. My hand on her bum pulled her to me and my face nuzzled against her tummy, my lips kissed her newly shaved labia and my nose took in her warm scent, the unmistakeable aroma of a woman aroused. K was masturbating me now, deftly working him with the gentle grip of her hand and when he felt a little dry she popped him in her mouth again and covered him with her saliva then letting him out again to continue the steady build up that I could feel was going to explode pretty soon. My fingers parted P's labia and I probed my tongue between them making her stiffen a little. I was going to try and place my fingers there but first I pulled her arms down and made her bend down to me. We kissed and my hands fondled her breasts, we broke off and my mouth found those hard, puckered nipples, I feasted for a while on the softness and hardness of her gorgeous boobs. with her tits in my face my hands found her bum and pussy again. With one hand on the soft peaches of her buttocks, the fingers of my other hand played their way into her inner lips and found a wetness that allowed a finger to slide in to her vagina. Her muscles flexed and held me as I began to speed up my fingering, making squelshy noises as I worked her vagina. When I couldn't take any more stimulation from K, and P had aroused my mental state, I uttered a groan, I knew it was time,
"Now girls ..... you've done it .... gonna cum .... get ready ..... Oh fuck that's it .... one last fast one K .... yessss .... nnnnng ..... Oh jeeez ..... " And I emptied my built up load of hot white jizz in spurts that K's hand would be able to feel pumping up my shaft and shooting out, hopefully for P to catch in the plastic dish. Between them they managed to direct my spurts to be caught expertly and ready to be used in our little experiment. I was still reeling from my orgasm and the girls began to be restless and wanting to start the viewing.
I began to recover and said to P, "OK get the slides, and why don't you wipe some of your pussy juice onto the slides, make the little swimmers feel at home. " They both grinned and giggled as a finger was inserted inside her and brought out, then the glistening lubricant was spread on the slides, about half a teaspoon of semen was then dropped on the slide from the culture dish. the girls whisked the slides away and fixed them on the microscope, and as they adjusted their viewers I was left to look at their two backsides. One fully clothed and one with her panties and shorts still half way down her legs.
"K ... K look .... I can see them ... wiggling .. swimming ..... Oh my god!" an excited P blurted out.
K didn't say anything. She lifted her head from the eyepiece and looked back at me, her expression was one of amazement, her eyes were wide with wonder, she looked down at my cock which had stirred again and was being revived by the sight of bums and bare breasts and legs and panties, then she returned to the microscope.
My head was spinning, my cock was rampant, there was only one thing for it ................ K didn't move a muscle as her shorts and panties were pulled down. Her pale soft backside was against my tummy as I guided a stiff hard penis into her waiting vagaina. She was wet, she was ready, this would be her prize for her hard work making me ejaculate. My other hand went to P's bum and she quickly looked sideways and knew what was happening. She pushed herself back, her legs opened slightly and my two middle fingers entered that still juicy entrance. I fucked K and fingered P...... then I fucked P and fingered K ...... twice each .....
I was exstatic .... delirious even .... "You fucking beauts ...... slutty little madams getting doggy fucked by their teacher .... gonna get spunked again in a minute .... spunked and freshly fucked when you play netball .........." I withdrew only just in time, then holding my cock I covered two backsides with more jizzy semen, running down between their cheeks, I slapped their buttocks with my softening cock and slumped down on the chair, breathless but bloody happy!!!