"I've got it!" Susan shouted.
"Did you find a cure?" Johnny asked her.
"Not exactly..." Susan said. "But I'd made a device that can transfer your testosterone levels to a container."
"And will that turn me back?" Johnny scratched his hair.
"I hope so." Susan said. "But I need a vessel for your testosterone."
"What about the monkey?" Johnny said. "He doesn't care." He pointed to the monkey in the corner next to the entrance.
"Perfect!" Susan said, she pulled out a blowgun and shot to Johnny.
A dart was stuck in his left testicle.
"Nice shot!" Susan grinned. Johnny fell asleep immediately. "What a waste! He's totally ripped."
Slowly, Johnny's muscles began to lose definition and deflate. His facial hair quickly vanished as well as the ones on his chest and crotch. His legs and arms ones thinned until they were almost Imperceptible. Finally, his armpits were the last place where he has body hair left but that didn't last long.
They were slowly sucked inside his skin until he was a hairless again. He looked like a lanky boy for a while.
His manhood retracted back to his former size as well as his arms and legs' length. Finally his huge feet became small boys feet again.
"That was fast." Susan said as she came close to her sleeping brother. "Now I need to release this testosterone on the monkey." She took the dart and put it again on the blowgun.
When the monkey saw she was going to shot him he ran away.
"Wait! Come back here, stupid monkey!" Susan yelled as she chased him through the laboratory.
After several minutes, she stopped to take a small break.
"Dammit!" She said when she noted how hot the dart was turning. "I need to release this testosterone before the dart blew out!"