J-Mac has a problem. He's trying to get tutored in science by Ms. Tosh, but he doesn't know what the heck she's talking about. What he does know is that Ms. Tosh is wearing a sheer, purple top and, as it turns out, no panties. He can't concentrate, and she wonders why. 'Look at what you're wearing,' he says. 'You're not wearing any panties.' 'I think you do know this stuff,' Tina says, 'and I think you've been coming here for other reasons.