"Transform!"
"Oh ho, that's rather brave of you," Kyle said in amusement, "And with only a second to spare, too. Got to admit, I'm a little disappointed you managed to make a choice in the nick of time, but I can still work with this."
"Hurry up and get this stupid game over with so I can get dressed," Jen snapped, using her anger to mask the nervousness she was feeling right now. She still wasn't entirely sure whether Transform or Dare was real or not, but at least if it was she would get out of this with her mind intact. Her body, on the other hand...
"As you wish," Kyle said ominously, "You just gave me the perfect idea anyway. You thought I looked more entertaining without clothes on, so let's see how you like people thinking that about you. For your transformation, you yourself aren't going to change. Instead, it's people's perceptions about you that will. From now on, everyone will think you look better without clothes on."
"That's it?" Jen asked incredulously, "Sounds pretty lame to me." She was pretty sure with a body like hers, that's what half the school thought already. He was probably just trying to make her paranoid with a bullshit curse if that was the best he could come up with.
"Oh, I'm just getting started," Kyle replied, "You see, from now on people will find your body parts unattractive if they're covered by clothing. For example, as long as you're wearing a shirt people are going to find something about your breasts they don't like, and consider them to be ugly. Conversely, any part of your body that's bared, no matter how innocuous, will be seen as incredibly attractive. So with a skirt and panties, people might think you have an unattractive ass, but those legs of yours will be getting a lot of attention. Because of this, if you want to keep people interested in that body of yours, you're going to want to start showing off as much skin as possible. Oh, and the attraction effect will only get stronger the less clothing you wear, so as you wear less and less, people are going to be less able to resist doing things like feeling you up on your exposed areas, to the point where they may even try to get you to ditch the rest of your clothes in some fashion, especially if they know about the curse. And if people see you completely naked... well, I'll let you see for yourself, since this is going to apply to both guys and girls, and you do share a locker room for gym and cheerleading after all. In fact, just to make things more interesting, the attraction effect is doubled for girls, and because of how attractive you are undressed you won't get in trouble no matter how little clothing you wear. Oh, and almost forgot: only you and I will be unaffected by your new aura, since the last thing either of us want is you stuck staring at your naked reflection all day. Have fun at school today, Jen!" And before Jen could say anything else, Kyle hung up.
"The hell kind of transformation was that?" Jen asked herself as she set down her own phone, "'Attractive only when naked'... As if guys think anything else anyway."
Dismissing the curse as some weird joke or delusion on Kyle's part, Jennifer resumed getting dressed, unaware of just how much her life was going to change...