Strip naked

Although you've never been naked before women, you trust that everything in your body is developed according to your age. Then you start to undress, first shoes, then socks, shirt and pants. You are in front of these women only in your underwear, and finally, you lower your underwear to your ankles, and then you take them off. Now you're totally naked, and these women could see your penis. You feel that the classroom is colder than the morning, and suddenly you look down in horror: you penis is fully shrunk!. You're scared, it's not that you're a porn star, but your penis was of normal size for your age, but now looks like a small worm. You go back to look up to see the reaction of the girls: The two girls closest to you are with their mouth open, while the third has a huge smile. Even Ms. K has has a sneaky smile, but she starts the class saying:

"This is a penis..."

The third makes the sound of a laughter, making you blush, but Ms. K continues with her class

"Penises come in different sizes. Viewing Mark's penis, what would say is its size?"

Two girls raise their hands: The first one and the third one.