Biology class

Sandry hurried up the corridor to the biology labs. In the doorway she met up with her friend Robyn, a cute red-headed girl with a slim figure but curves in the right places.

"What are you wearing?" Robyn asked, looking Sandry up and down.

"They shrunk." Sandry replied, pouting. "I just hope they'll be okay for the day. Want to come to the shops after school with me so I can buy a new pair?"

"Sure." the two girls followed the rest of the class in and took their seats. Sandry was glad that for the lab they sat on high stools, she would not yet have to try and sit on anything lower in her tight clothing.

"Morning, class." the teacher, a dark-haired woman in her thirties named Miss Marshall, stood at the front, "Today we're going to look at the effect of exercise on the autonomic nervous system, what effect it has on your body beyond your control. I want you to pair up for this experiment." Sandry and Robyn smiled at each other, knowing they would pair up. Miss Marshall went on to explain that ine of each pair would be exercising, and the other would take baseline readings of pulse and breathing before and after to compare.

"Okay," Robyn turned to Sandry, "which do you want to do?"