TVR/Janet/Runaway/Penis/School/Afternoon

You normally pay attention during English; Mr Baker is a lot younger than most of the teachers and quite good looking, with sandy coloured hair and blue eyes. Sometimes when he reads poetry, it makes you feel quite funny inside. Today he is droning on about the difference between colons, semicolons and commas and you can't help thinking about Susan with her uncle. You've seen him around and sometimes he helps Mr Johnson in the garden if there's any heavy lifting to do. He is quite old and pretty ugly with his bald head and big belly and it's hard to imagine him with Susan.

Thinking about what Susan told you makes your pussy itch, so with a quick look to either side to make sure no one can see you, you slide your hand up between your legs and get two fingers inside the leg of your knickers so that you can rub yourself. It feels pretty good and it's made even better by the naughtiness of doing it in the middle of the class and your gradually working yourself up towards a climax when you hear your name called out.

"Janet Howard," Mr Baker is saying. "Perhaps you can give me an example of when to use a colon." He walks between the desks towards you and you can feel yourself going beetroot red because you haven't got a clue what he's talking about and just sit there looking at him. "I don't know what's got into you today," he says. "Two fingers," you think and have to suppress a giggle. "I want you to stay after class and write out a hundred times: never use a semicolon to replace a colon."

At the end of the class, the rest of the children file out; a couple of them are looking at you and giggling. You take a piece of paper and start writing, but Mr Baker stops you and tells you to come to his desk at the front of the classroom. "Don't bother with the lines," he says, "I just want you to tell me why you're daydreaming in my class. You're usually one of my star pupils."

You blush again and mumble something about not sleeping very well and how punctuation is a bit boring. "You may think it's boring, but you'll be surprised at how important it can be. There's a book open on his desk and he turns it so that you can see the page. "Imagine if this was written all in a single block with no commas, full stops or paragraphs; it would be very hard to read." He turns sideways so that you're standing right in front of him with your knees almost touching. "You're a very pretty girl Janet, and I know that girls your age are going through a lot of changes." He reaches out and catches hold of your hands, one in each of his. "If you're ever worried about anything or need some advice, don't be too shy to ask me about it."

You feel slightly silly, standing there holding his hands and when you look down at his lap you suddenly realise that you can see the bulge where his penis is and you have to bite your lip to stop yourself from giggling. "You'd better go now," he says, "I'm sure you'll soon catch up." He lets go of your hands and you turn to walk away. "In the old days, I would have put you across my knee and spanked your bottom for masturbating in class," he says.

• Later that evening