You pull off your blindfold?

Deciding that you've had enough of this foolishness, you yank off your blindfold. Much to your shock, every single girl in the room is stark naked at their desks. Even Ms. A is naked behind you, her plump figure shaking as she walks over to you.

"Now John, the experiment isn't done yet..." she says.

You smile at her: "Ms. A, let's try something else. After all, you do encourage us to think for ourselves and design our own experiments."

She pauses, and says "What do you have in mind?"

"Let's examine age versus nerve response to stimulation."

She tilts her head, her body shifting, making her juicy breasts shift. Your eyes dart down, you can't help but stare at them.

They are nice, at least a 38C, the kind of breasts you'd see in a Playboy. You want nothing more than to wrap them around your cock, and breast fuck her like the toy she is. In your mind, at least.

She smiles at you, and says "Ok, John. We'll have 4 samples taken from the class."

I shake my head, and say "Not a big enough sample size, we need an older woman. Like you, Ms. A."

She crosses her hands over her breasts, and stares at you hard. "I'm not sure that my being involved is the best thing for this lesson."

You pout a little, "Ms. A, don't discourage me from learning! It will enhance the experience."

She sighs, and nods. You ask for 4 volunteers and tell them to sit up on the bench.

Your subjects are:
Katie, skinny, only about 5'4", and shy, but with a nice young body with pert breasts.
Kelly, latina, she's a dancer, with the sexiest ass you've ever seen.
Sam, short, with tiny B cup titties, she's got the sexiest smile and eyes you ever seen, and she constantly teases/flirts with you in class.
Jordan, tall, curvy, with gigantic 36F size breasts, and a behind to match.
Ms. A, a 35-year-old teacher. Tall and juicy. Her body just screams MILF.