She made you a pushover

The teacher pointed the phone at you and pressed a button, probably setting you as the target. You reached forward and said, "Come on, I was just messing around. Give me back my..."

You trailed off. Suddenly, it didn't seem worth the fight. "I mean, you don't have to, but I'd like it if I could have my phone back."

Your professor, who now looked like an extremely stacked 19 year-old in a ripped blouse, held up the phone and smirked at you. "What if I said I was never giving it back, Mr. Doe?"

You frowned, but didn't try to take the phone. "That's not very nice."

She laughed. "That's very interesting! There aren't a lot of mental options, but lowering aggression down to nothing mostly does what I'm looking for. I'm not a fan of the mopey routine, though. Let's see what we can do with your dopamine levels. Smile for me!"

She made another quick change, and you felt much happier.

"That's better. How do you like it when someone tells you to smile and you can't fight back?"

You shrugged, but happily. "It's fine."

She didn't seem to like that. "Hmm, I can't tell if you really don't mind or if you just aren't able to disagree. Let's go ahead and make a few physical changes to make the point."