We were graduate students studying sexual deviation, partly because of professional interest and partly because of very personal interest. We’d been...fucking our way through graduate school together, as much professional partners as personal. Having each other available for all the banging we needed took a lot of distraction away from our graduate studies but we were getting to the point where we needed to do a research project and we got permission to collaborate on this one.We looked at all. When I got to her place at the end of the night we chatted and I again asked to see her for a date soon. she told me she would love to and to give her a call. We had a nice kiss and a hug and I went home.I could not help it but kept on thinking of her and Jim the man she was with earlier that week, something was a bit odd. I called Cheryl on Thursday around noon time to see if she wanted to go to a movie, when she answerd the phone she was out of breath and all throu our conversation seemed pre. A sexual confidence that I was just drawn to. She stood before me, totally nude. Standing on her tip toes, she leaned forward. With a smile, as she looked into my eyes, she flicked her still cum soaked tongue against my lips. Running her tongue along and licking my mouth, she made me and encouraged me to taste my own cum as she kissed me. My cock twitched and began to swell again already!She kissed me open mouthed and deeply. Our tongues touching and dancing. I held and felt her petite, slim. “Thank you.” she whispered.Becky smiled at her. Sandi was starting to relax a little, letting me begin to pull my prick out of her.“No!” she cried, trying to reach back to hold me in. “leave it there for a while, you feel so good in me.”I stopped moving, holding her close. Becky twisted around, kissed Peter, and got up, headed for the downstairs bathroom, he followed her after a moment. My prick was very slowly starting to soften, the cock ring effect, Becky had mentioned once. We cuddled.