Sexy Fun Times/Work/Doctor/Sex Ed/Actors

The young couple come in. They might be familiar to people who like to watch teenage porn and although, both are over eighteen, they look younger. "I want you to welcome Sarah and Mike who are going to give us a demonstration today," you say. The class dutifully applauds as they move up onto the stage.

Sarah is a petite, attractive five feet tall, with long dark hair, tied back in a ponytail and a trim body. Mike also looks younger than his age and has a slim, androgynous body. They stand side-by-side on the stage, looking out at the children.

"The pictures I showed you were of children more or less your age. Mike and Sarah are fully grown, so you will notice quite a few differences." Sarah moves front and centre and drops her robe making several of the boys gasp. "You can see that her breasts are well formed and need no support. As she gets older, and especially if she has children, they will begin to droop and she will have to wear a bra to support them. However, many young girls wear one to stop their nipples from rubbing and if they do sport, they need to stop them bouncing." Sarah obligingly bobs up and down a few times to demonstrate.

"Sarah and Mike are used to having sex in front of strangers, so they don't mind you watching. It's a funny thing that although most people like to watch others, either in real life, or more often on a screen, they prefer privacy for themselves. However, as I said, Sarah and Mike do this for a living." You turn and tell them to get ready.

"Now, For today's lesson, I want you all to come up and take a close look at our two models. You can touch them if you want, they won't mind, but take your time and see if you can identify all the parts that you have seen in the pictures. One thing you should note though, is that they should both really have some hair around their pubes. A lot of girls and boys like to shave it off. Mike and Sarah do it because the people who watch their films like it that way."

The two models sit up on your desk and, after some initial reluctance, the children crowd around them. At first, the boys go straight to Sarah and the girls to Mike, but with a bit of encouragement they are soon examining both sexes. Unsurprisingly, it's