A "little" outfit change

Now I want to test the boundaries of my wishes.

I wish every girl in this gym is barefoot.

In the blink of an eye all of the girls are barefoot. They all look at each other confused, while I start smirking.

I wish the only person, who will notice the future outfit changes will be me. I wish all of the girls will be completely nude.

Suddenly me and our teacher, Mr. Smith, are the only persons dressed in the gym, but the girls don't cover up. The teacher starts talking and explainig what the plan for todays lesson is. Then a girl is raising her hand.

Mr. Smith: "Yes, Chloe?"

Chloe: "I don't think we can do this lesson properly."

What? They shouldn't have noticed my change.

Mr. Smith: "And why is that?"

Chloe: "I know it sounds weird, but all of our shoes and socks just vanished."

Mr. Smith raises an eyebrow: "So, why are Michael and I still wearing shoes?"

Chloe: "I suppose it only effected females."

Mr. Smith: "Of course, but I don't think it will stop you from doing todays lesson."

Chloe: "What is todays lesson about?"