Her smile was huge when she saw me and came out to great me with a hug; she smelled good, like fresh shampoo and just a hint of female sweat.We worked...hard for an hour during which I spent most of that time stealing peaks at her lovely chest or at how her ass cheeks pushed out of the bottom of her shorts teasingly. I don’t know if it was the hard work and sun or my hormones from watching her but either way I was sweating a lot and my shirt was soaked, so I took it off to be more. "So, you're saying we've got to do it?"She nodded. "Get down on your knees and prepare to suck cock." She idly flipped the remote to their collars in her hand.The pair got in position in front of the two doctors. The men dropped their pants and underwear, revealing their erections. Dr. Phillips, who was in front of Rose, was about seven inches in length, and Dr. Wong, in front of Roberta, was about half that, but was wider around."I don't know what to do," whispered the scared Roberta."Just. He turned to the class, running his eyes over the class, he did a quick count, and all 24 students were present.'Right I see all students are present so we will get started immediately. This is Kelli; she has volunteered to perform as the experimental subject today. I expect all of you to conduct yourselves in the most professional manner during this special class exercise.'Turning to Kelli, 'excuse me for a moment, I just need to check everything has been delivered to the store for the. I heard what sounded like the cap of a bottle of lube being popped off. I raised my arse higher than it was to show that I was cool with that. It wasn't until I could feel Cooper pushing against my hole did I remember that Cooper pretty much had a beer can where his cock should be. I was previously lost in memory of how good James' cock felt but I forgot how it felt getting used to him. I felt as though my arse hole was going to rip open but Cooper kept on pushing. I tried to distract myself.