Diana gives a warning, but doesn't stop you.

"Ok class," Diana says swiftly, interrupting before you carnal impulses can get totally out of control, "This is an excellent example of how a little bit of arousal, or a lot as seems to be the case here, can move things quickly from foreplay to something a little more...intense."

As she talks, you continue slowly grinding your cock against the fabric of Samantha's panties. You're almost nose to nose with her- you can feel her short breaths against your face, not quite gasps but definitely excited. Her one breast still fills your hand, the other breast so close you're almost tempted to let go of her ass and grab the breast instead....

Only then you wouldn't have such great leverage to keep rubbing your dick against her hot, rapidly moistening undergarments.

"However," Diana says, "We need to keep some semblance of structure today, as it is supposed to be Sex Ed class, not just 'watch Joe and Samantha get in on" class. So, let's talk about impulses. Joe, right now, what are you feeling the impulse to do?"

She wants you to use words?! You don't want to talk, you just want to throw Samantha against the wall and fuck the bejeezus out of her.

"Well," you say, "I really want to pull her panties out of the way, and slide my dick into her." Samantha leans in as you speak, lightly pressing her nose to your neck, and gently rolling her hips against your cock. You feel some sparks of tingly pleasure flash through your balls.

"Great," Diana responds, then, addressing the class, "Notice how he saw her undressing, then his penis got hard, in preparation to enter her vagina. Then, she let him touch her, which may have suggested to his body that she was open to intercourse as well. However, that doesn't actually mean she wants intercourse. We'd have to ask her. Samantha, what impulses do you have right now?"

Samantha laughs into your neck, now rolling against you faster. Her voice is shaky with pleasure, but still strong and happy. "Um, yeah, I'd like him to fuck me, if you'll pardon my language." She said, "Or, he could go down on me, or finger me, but mostly I'd like him to pull my panties down, stick himself deep into my pussy and then go to town."

The class giggled a little awkwardly, probably not expecting this from their classmate. You glance briefly at Diana and notice that she's looking a little flush, hard to tell if she's embarrassed or turned on. From the way her eyes keep watching the mesmerizing dance of Samantha's hips grinding against your cock, you're guessing it's the former.

"Great," she repeats, looking very much at a loss for how to respond, "Well, I'm sure we'd all love to see that, but, that's sort of jumping ahead. Doesn't anyone else want to touch Joe, or practice oral sex or something? If he fucks-- sorry, if he has intercourse with Samantha he'll probably orgasm, and then he won't be hard anymore. Then you girls don't get to try. Does anyone want to try sucking on him first, or should we just let these two do their thing?"