Testing begins

"First we must establish a baseline," says Samantha. Her stylus skitters across the surface of her tablet. The cool air of the science lab tingles against your naked body. You are sitting up on a lab table. Tammy is holding a measuring tape against your skin. She lifts your arms and then your legs while she calls out measurements to Samantha, who jots them down. You ask her what the point of this is.

"Elementary, my dear~ Your body has undergone a momentous change. But it is yet to reflect the impact your - uh - new diet might have. Each of us will take turns feeding you — one week at a time. We will measure your body as it is, and together we will document any changes that may occur."

Samantha clenches and unclenches her hands. "Just think of the insights this could provide to health science, nutrition, our fundamental understanding of the human body!" It's then you notice a firm bulge straining the front of her shorts.

"Life as we know it may never be the same..." She says as she wipes a strand of drool from her mouth. "Alright. Final checks. Height, weight, waist-to-hip ratio — tick, tick, tick... We're set. Let the experiment begin." Samantha unbuttons her shorts.

"Who says you go first?" Says Tammy.

"I am the one who proposed this project!"

"That doesn't give you the right to go first. Let's settle this properly."

"Very well. Random number generator it is."

"I call even!" Shouts Tammy.

"I call odd," mutters Samantha, punching instructions into her tablet.

Far from running a train on you, it seems these girls like things very organised. They're doing science after all.