Rodney and Mike never showed before I left for home. They were the guys with girlfriends so getting samples from them would probably come later. I packed up Steve's sample and the remaining two samples from Daniel as well as my own flash drive of videos. The others I had already eaten. Tami was gone when I stepped out of my office. She was quite the little vixen. I had more confidence in her not going public with my obsession since she seemed to be getting her own 'jollies' out of my research as well.
I couldn't wait to get home, get naked, power up a vibrator and masturbate to my clips while slowly enjoying the last three samples of the day. I really wanted to slow down Daniels incredible contractions and watch his ejaculation in slow motion. I was almost to my vehicle, daydreaming about slowing down and combining clips when I heard my name being called from behind. I turned and saw Rodney with a female student hurrying to catch up to me.
"Professor... we must have missed you in your office but we need to talk," Rodney said.
"Okay, what's this about?" I asked looking between him and the female.
She was cute, much shorter than Rodney with brown hair, blue eyes and a cute little body.
"This is Sara, my girlfriend. She's also in your Biology 101 class along with me."
"Hello Sara. What can I do for you two?"
"Well, we were wondering if we both could receive that extra credit for the ejaculation study. I mean if I help film Rod when we have sex or when I do other stuff to him can I get points for that as well?" Sara asked me.
"I'll tell you what... if you want points as well then I'll have to split them between the two of you so if you want more points you'll have to produce more samples," I explained.
"We can do that no problem!" Rodney burst out excited to have more sex.
"What about you Sara? Does that sound okay with you?" I asked.
"Okay, yeah sure. I'll help out and get Rod on film as he cums for the study as much as I can."
"Wonderful, then it's decided. I'll tell Tami to add you to the study and split the points per sample between the two of you."
"Great! Thanks Professor and here's our first sample and memory card," Sara said opening her bag and retrieving the container and card.
"You were waiting to give me this after you got approval? That makes sense I guess."
"Yeah, kinda. Anyway there ya go. We'll get more to you later," Sara said grabbing Rodney's hand and pulling him away.
I added the card and sample to my others, excited to see what they had given me. Good thing I lived close to the university, I was overly excited for this evening's fun to wait too long.
*****
I quickly ate a bowel of cold cereal for dinner and stripped off my clothing, before heading into my computer room. I plugged in my flash drive as well as the memory card from Rodney and Sara. Opening my drawer I retrieved a long and wide vibrator, resembling a porn stars cock. Setting it on the desk I first picked Sara and Rodney's clip since I hadn't seen it before.
A bedroom opened to my view, a girl's room obviously with the posters and decorations I saw. The picture jerked around, making me sick until it finally came to rest on Rodney. He was naked, keeling in front of a pair of women's legs I assumed were Sara's. I could only see his upper chest and face while his hands held her feet. He was thrusting forward, obviously making love to Sara.
"Oh yeah, that's perfect Rod! I guess this camera thing does add a little excitement!" I heard Sara's voice behind the camera.
"Remember, she wants video of me cumming so I'll have to pull out," he said between breaths. He seemed to be working hard.
"Yeah, okay, just do it on my stomach and I'll record it," Sara responded.
I heard no more talking but both of them moaned and increased their breathing until Rod warned Sara he was about to 'cum'. The camera dropped down from his face to his penis as he pulled out. I could see her stomach and shaved mound as Rodney stroked his penis over her. He wasn't using a condom so nothing to take off. His penis was wet and shiny from Sara's insides. From what I could tell he was average, around six inches. After only a few strokes a burst of semen shot toward the camera lens, splashing onto Sara's tight young stomach. She squealed in pleasure as it hit her, knocking the camera off Rodney for a split second.
She recovered to capture the remaining spurts of ejaculate. Oh how I loved these young men with their quantity and power! He made a good mess out of her body from what I could see before she turned off the camera. I replayed the part where he ejaculated and grabbed the vibrator. It went inside of my wet vagina easily, especially after all the excitement of the day. I turned the red knob on the end, sending deep vibrations through my body. I started the video over completely, beginning to thrust the toy in and out, synchronized to Rodney's movements on screen.
By the time he was ready to climax I was on the verge. The thing that pushed me over the edge was of course watching his wonderful engorged penis spew its load onto Sara's body again. My eyesight became blurry as a wave or orgasmic bliss took over, making me convulse and squirm in my chair. I held the vibrator in deep, bending it to hit just the right spot, climaxing in a rush of pleasure I'd waited all afternoon for.
My body felt weak and spent when the sensation lessened. Once I recovered I removed the coated vibrator, giving my pulsing vagina a break. I realized I had yet to open Rodney's sample. In my excitement and pleasure I completely forgot about his semen on the desk in front of me. I picked it up and popped the cap off. Peering in, I saw a good amount of runny semen. When I smelled it, it wasn't the pure manly semen I have come to expect. It had a different hint to it, which had to be Sara. Taking the sample off of her body must have tainted it, absorbing her body spray or lotion.
It reminded me of sucking and eating Daniel's sample off of Tami, stimulating me again with the memory. I licked my fingers and twisted my naked nipples, pretending Tami was sucking and nibbling on them. Tipping the container I poured a small amount of Rodney's sample on my right breast, rubbing it around with my finger. Lifting my large breast to my mouth I licked and sucked the semen off of my own nipple. My clitoris began to hum again, sending chills through my body as I treated the left nipple to the same treatment.
I saved most of his sample for later, closing the container and deciding it was time to edit my clips. Using the media software I opened each clip I received today. Editing out what I didn't want, I shortened the clips to just before ejaculation, during and slightly after as the boy finished himself off. Once I had all the clips edited I added them all together to play one after another. First I played them in real time and then copied the clip and slowed it down so I could watch each powerful spurt in slow motion, adding it to the real time portion.
Justin's amazing eruptions looked even better in slow motion, as the white ropes of semen extended out from his cock before splashing onto the table. I froze the frame a few times to take in the visual and glory of his power. Daniel's rapid spurts were so close together I had to slow them down twice as much as the other boys to make them look like they were all the same speed. I couldn't believe the rate his muscles constricted to fire the ejaculate out so quickly.
By the time I finished editing the clips and watched it a few times I was dripping wet again. Good thing I put a towel over my chair because I had made a mess. My long vibrating toy found itself deep inside once again while I watched my masterpiece looped over and over. I helped myself to the remaining samples while I watched and eased the toy in and out of my dripping pussy. I came each time I swallowed another gulp of ejaculate, timing my climax to match the memory of eating their semen.
By the time I had finished all the samples my entire body was sore from convulsing and squeezing the toy between my legs. Walking to my bedroom took some caution, since my legs were so wobbly from fatigue. I slept like a rock from all my efforts.
