subtle at first

"Here's the rules," said Shannon. "We tweak our mark one change at a time. If your girl freaks out first, you lose. If my girl freaks out first, I lose."

"What does the winner get?" you ask.

Shannon raises an eyebrow. "Loser performs oral sex on the winner!"

"Deal!" you shake Shannon's hand.

"OK, more rules," says Shannon. "We cannot alter reality. We can only make physical changes."

"With one proviso," you say.

"What's that?"

"We have to give the girls a reason not to just up and leave right now, so we have them believe they need to stay where they are and not be able to see us."

"Ah, I'm on it." Shannon concentrates.

The two girls sit on benches opposite each other along a sidewalk between two campus buildings. They take out their phones and start texting and surfing.

"So who goes first?"

"Rock, paper, scissors."

"Rock, Paper, Scissors, Match!"

You have your hand in fist, and Shannon has her hand stretched out flat. "I win!" she says.

She looks at the brunette. Suddenly, the brunette has a bushy unibrow. She does not notice and keeps playing on her phone.

"Hmmm," you say. You change the blonde's hair color to a hideous yellowish-green snot color. She does not notice as she keeps texting.

The brunette's butt expands ever so slightly, but she shifts in her seat and continues on what she is doing.

The blonde absent-mindedly moves her arm over her breast, not aware her nipples are now bigger.

A huge zit appears on the brunette's forehead.

A huge zit appears on the blonde's chin.

The brunette wipes her mouth with the back of her hand as some drool appears.

The blonde lets out a long loud fart. She blushes and looks around. It was so loud, the brunette looks up. They make eye contact and look at each other suspiciously. Apparently they were familiar with each other enough to notice they look different to each other. They go back to their phones.

"OK, this is boring," said Shannon.

"Do you give up?" you ask.