That led to an unscheduled lesson. After all that beer, we both needed to pee. That was when we realized how sheltered our growing up had been. We h...d neither one ever seen a member of the opposite sex pee. We took turns watching and now we know.It was now time for lesson #3 – doing it doggie style. Jon told me to get on my hands and knees. I did and he knelt behind me, reached around with both hands and started to play with my breasts. I could feel his erect member rubbing around between. She pulled out his erection, holding his girth firmly in her hand. With her other hand, she pulled her panties aside allowing her to rub the tip into her moisture, coating the head of his penis in her juices. A moan rumbled in her throat as she slid herself down onto the shaft, feeling every single inch open her up more and more. His thick dick filled her tiny pussy as she sat down onto it. Sighing, she looked him in the eyes again before meeting lips and kissing for the first time. His full. She was wearing a sweatshirt, which was big, no one would notice. So after a little more time she took my suggestion. She commented that she felt "naughty" and naked because her sweatshirt was so big that it felt like she wasn't wearing anything. She was obviously getting turned on by the feeling. Finally she arched her back to stretch and I could obviously see her nipples through her sweatshirt. They must have been rock hard. I had to feel them. I commented about her nipples and how she might. . Oh!... Vincent!!!” uttered the young girl unintelligibly. ” She is… She is lick… Oh!... I am CUMMING…” Her screech was so loud that Bonnie and Vincent feared that they might be heard by some of the people shouting and dancing just around the corner, a stone throw away. ------------ When Vincent finally pulled out, the girlfriend dropped exhausted and out of breath to the ground. She was still struggling to breath. With her hair in partial disarray and in a pose indicative of the fact.