That is a damn good question

There wasn't much class time left, but William spent every second of it enjoying the afterglow. The cute brunette with c-cups kept stroking his cock gently as his erection steadily faded, then switched to fondling his balls. He hadn't even told her to do any of that; he just kept standing within reach of her, and she kept massaging him.

Even after class ended, she just stayed in her seat and kept playing with the genitals dangling next to her face. The girl with the E-cups gives him her number on her way out, and that guy who'd offered a picture of his girlfriend's tits earlier cut out the middle man and gave William his girlfriend's number too.

"You really like Lizzie's hands, don't you William?" Ms. Dalton asked from behind her desk as she started putting on her bra.

"Lizzie? Is that her-- Hold on!" he frowned, and Ms. Dalton froze. "I didn't say you could get dressed!"

The pretty TA blushes a little under her facial. "I'm sorry, William. I just thought that, since class was over and all--"

"I want you to stay like that. You said you were more comfortable with your tits out anyway, right? And you're not gonna get that sweater back on without smearing my cum all over it."

"Well, I can't say that doesn't sound nice..." she admitted. "But do you really think it would be okay?"

"Of course it's okay!" William insisted. "There's nothing wrong with teaching topless. It's good for holding your students attention."

Ms. Dalton's entire demeanor shifted suddenly. "It is good, isn't it? This was one of the most engaged my students have ever been on the first day of a morning class! I'm never teaching with a shirt on again!"

She shoved her shirt and bra into her bag with her various books, then strode proudly out the door with her perky tits bouncing freely every step of the way.

William and Lizzie were alone in the classroom now. His pants were still around his ankles, her hand was still cupping his balls, and she was casually texting her friends with the other.

"So..." he asked awkwardly, clearing his throat. "This was my last class of the day. Do you have anywhere to be?"