"What are you going to test?" Johnny asked from inside the cabin.
"Hormonal levels." Susan replied as she set the testing. "Specifically testosterone. We have the idea that your body copied dad's testosterone level instead of swapping minds."
A red light covered the interior of the cabin. Johnny had to close his eyes.
"If you feel tinglings, don't worry." Susan shouted as the machine began to make noises. "I'm inducing you to a state of ecstasy."
Although he can't open his eyes, Johnny can feel his body tingling like thousands of ants moving through it. But what he didn't note was the growing throbbing inside his briefs. When he realizes how aroused he was getting he fell on his knees at the time his briefs ripped off.
"Oooh uoooh!! We a have problem here!" Johnny shouted as he touched his throbbing 10" erection.
"Don't worry, Jonathan. It's normal. I'm messing with your hormones." Susan shouted. "You're isolated so I can't see you. You don't have to be ashamed."
"I'm not ashamed." Johnny groaned. "I was worried that I could be harming the testing!"
After some minutes Susan turned off the program, took a towel and opened the cabin.
"That's all." She said as she extended the towel to Johnny. "Cover up yourself. We need to check the results."
Johnny stood up and took the towel. He wrapped it around his waist and left the cabin wishing that Susan didn't note the puddle of cum near the door. Nonetheless, he was happy and smiling.
"I lied." Susan suddenly said. "There is a camera inside the cabin."
"There's what?!!" Johnny yelled as his face turned red of shame. "You told me...!"
"It's a joke! Haha!" Susan laughed. "But I don't need to be a genius to know what were you doing there." She winked and Johnny blushed.