The number 69 appeared often in my mind. And I imagined my throbbing, erect penis being inside Dianne's vagina from the rear, while Kristin, my beauti...ul wife, was in front massaging Dianne's clitoris and sucking on her breasts, and that Dianne was massaging Kristin's swollen clitoris. And I imagined that we all came to orgasm at the same time this way. What a fantasy!After one hour of sheer erotic sex (I have never made love to a woman who could have several strong orgasms in a row like Dianne. She opened the door cautiously and then ran to her room across the hall. Meanwhile I had seen her ass for another minute or so until she was gone. I now knew why every guy in school was in love with her. Cynthia was a goddess.The next night Cynthia gave me seven minutes of payment. Each day after that she gave me another minute until I got up to ten. Every night she got wetter and wetter as I stared at her pussy. The wetter it got the more it opened up. At ten minutes I could see her hole. The nurse selected a brown rubber apron for me to put on. Wearing a rubber apron was of course something that (secretly) I didn't mind at all. I pulled the loop of the apron over my head and the then nurse had me turn around so that she could do the ties up tightly around my waist. That done, she ushered me through a door at the end of the room with the cold rubber of the apron flapping against my bare knees. I walked through the doorway and found myself in a modern and well equipped dental. I take a breath. Gently grab the underside of the balls with my left hand and put my fingers of my other hand around the base of the cock. I lick it. I lick the underside of the head of the cock. I feel no desire to stop.My desire is only to get that cock into my mouth. I lick the head all over. I then kiss the head. Deeper and deeper I try to put it in my mouth… but fail. “Open wide. This is a real cock. You need to open wide,” I’m told. I’m salivating at this stage, all I want to do is get as.