I was pretty excited to go to the second session of my photo course in Explorative Photography, as the first course day had been quite interesting. I passed the barrier saying 'Men at Work, Keep Out!' and met with the other students. Soon after the teacher came round, presenting the model. She was thirteen, black, long-legged, slim, tall and fairly well-endowed for her age. She had the most amazing blue eyes like the summer sky. She wore a diminutive yellow strapless bikini with half circles in the front, barely covering her nipples. The bottom part was hardly more than a pair of G-strings. Absolutely stunning. The teacher started by telling us that this course was about explorative photography and not about just posing a model. So all of us got close up and tried to get pictures showing details of the human anatomy, trying to make it look good. At some point I tried to take pictures of the bikini top and the contrast between it and her black skin. At some point I mumbled something along the lines, "I wish her nipples were more prominent to break up the pattern of the top." She must have heard it for without further ado, she pulled the top down, spat on her fingers and twisted her nipples until they were completely erect. She pulled her top over her breasts again and the nipples did break the pattern just as I wanted. "OK," the teacher said. "So much for the bikini. Now you'll have to be a bit more creative as we'll remove the quite visible contrast of the yellow cloth." When I looked back, she had removed her bikini and was completely naked. "Come here," the teacher said and indicated to me. "If you look at this area." She let her fingers circle around the model's hairless pubes while I clicked away. "You'll see that the angle of the sun flattens the lines and there's hardly any contrast between the smooth areas ..." She ran her fingers across the area above the slit. "... and the folds." She spread her labia with two fingers, showing off the big clitoris that seemed to swell as we looked at it. "If on the other hand you make her lie on the side ..." She guided the model down on her side. "... and have the sun come in across her hips, you'll see much more detail." She was right, her clitoris created a shadow across her labia and suddenly it was quite clear how big it really was. I took some more pictures, from different angles. "Please spread you legs some more," I said to her. She did just that and I took some pictures at a very wide angle from below, showing the damp, pink opening surrounded by swollen labia and punctuated by her big clit. Small beads of juice started to form and when the sun caught them, it looked like she had a diamond lined pussy. After I moved away, one of the other students took over and clicked like mad around her pubic area. "I would like something to break the pattern here," he said, indicating at her pink opening. "Any ideas?" The teacher looked around and smiled wide when she saw my hard-on outlined in my shorts. "I think we have just the right thing here," she said and went over to me. "Do you mind breaking the pattern?" I was not quite sure what she meant, but I wanted to be helpful so I said yes. "Thank you," the teacher said and pulled my shorts down. My erection jumped out and stood proud, twitching with each heartbeat of mine. The teacher guided me down on the grass and had the model sit on top of me, her pussy almost touching my dick. Talk about teasing. The other students flocked around and started to take pictures. "Turn a bit, please." Click. Click. Clickety click. "A bit closer." Click. Click. Click. "In here." A hand guided my erection just inside her pussy. Clickety click. Click. Click. "And sit up straight please." She did which made her push down on my erection and suddenly the head touched her cervix. Click. Click. Clickety click. Click. Click. "Lift up a bit." She did and my juice-covered dick was halfway out. "Thank you. And down again." She did, but slightly uncontrolled which made it a bit hard and suddenly I felt the head surrounded by a tight ring. I had entered her cervix. She gasped and so did I. She started to move up and down without further instructions and after a very short while she leaned back with closed eyes and moaned in a huge orgasm in front of all the people. The cameras clicked like mad. And guess what. I couldn't hold back either and filled her womb to overflow with my hot sperm. She tilted back and my dick came dislodged from her hot pussy. I sent a few feeble spurts across her front with little streams of sperm running from her breasts into her beautiful belly button. "Sorry about that," I said to her when I had regained my composure. "Let me help you clean up." "That's OK, Dad."