Oral Stimulation

"Can you apply oral stimulation without contaminating the sample?" I asked with lusty grin.

"If I pull off before you ejaculate, the sample will be fine. This is why we used unflavored water-based lubricants. Just inform me of your impending release," she said and then licked her lips. She bent her head down and swallowed the head of my cock. Her lips felt so good on the rather greasy tip. Her tongue lavished attention on the slit, while her cheeks sucked in, applying pressure to the head. If I hadn't just come multiple times, she would have just about had me right then.

She worked her mouth down until she had consumed about half of it before she came back up and repeated the treatment of the tip. The next dip took about two-thirds of my cock; the feeling of her tongue, lips, and cheeks on my steel-hard manhood was amazing, and I closed my eyes to the ecstasy. Within a few plunges, she started fondling my balls with one hand. I was overcome by the pleasure of her mouth. I opened my eyes to get more stimulation.

Watching her head bob up and down and her tits swaying and bouncing kept me hard, but my recent activities were going to keep me on edge for a long time. After several more minutes of giving me one of the best blowjobs of my life, Dr. Jones realized that she was going to kick it up a notch to get me to orgasm. She pushed her mouth down all the way until her lips were grazing my short curlies; she gagged slightly, but recovered by relaxing her throat. Instead of continuing her up and down motion, she kept my cock down her gullet and began swallowing.

With her throat rhythmically squeezing my cock head, her tongue whipping the underside with fervor, and her fingers massaging my balls and taint, it only took another minute of earth-shattering sensation before I shouted, "Here it comes!"

Dr. Jones instantly took her mouth off and put two cups that she'd put under my chair without me seeing it around my prick, one on top to prevent long-distance spurts and one underneath to catch everything that dripped. Her face was a mask of carnal hunger as she stroked me as I climaxed, milking as much jism as possible out. My body was in heaven; unfortunately, my efforts of the day had left me exhausted, and, before I had finished coming, I passed out.