"What the fuck did you do?" said a male voice. Kyle looked up to see himself. At least it was a man who looked exactly like Kyle had a minute ago incuding the trousers and shirt he had been wearing.
Kyle had not realised how big his old body was. At 6 ft it towered over his/her current female body. "Shit! Oh wow! We've swapped bodies!'
"Der!" said the now male Sharni. "I'm choosing what to wear on my date and suddenly find I'm lying on the floor in my brother's body! I know I didn't do this! So what the fuck happened? Why have we changed bodies?" It was intimidating to have this angry, large male body standing over Kyle.
"I guess it was that potion I drank" replied Kyle, his/her voice sounded so meek and feminine.
"Potion? What potion?"
"Just stuff I bought at a store. I didn't really think it would work. I'm a girl....."
Sharni could see that his feminised older brother was in a panic. She tried to calm down knowing how intimidating an angry Kyle could be. "Okay. Tell me about this potion. Show me. Is there a bottle or something?"
Kyle realised now that he was wearing the top and skirt that Sharni had been wearing. He grasped 'Her' boobs. They were like two water filled balloons attached to 'her' chest. He could feel they were encased in a bra "I'm a girl....."
"Yes you're now a woman and you have somehow changed me into a man. Show me how this happened so we can swap back. Where is this potion?"
"I drank it. And then.... And then I'm you....."
"And I'm you. Now think calmly. Where is this bottle of potion?"
"In my room"
"Okay then. Let's go to your room and you show me this potion" Kyle found himself being led by his feminine hand back to his own room.
There was the bottle on it's side on her desk. "There. That bottle" Kyle pointed. His fingers were covered in red nail polish.
Sharni immediately reached for the bottle but could see it was empty. "It's empty. What did you do? You drank it all?"
"I swallowed what was in it. There wasn't much"
Sharni read out loud the label on the bottle "Body swap potion. 100 mL. Caution: read instructions before use. Do not use if you are under 15 years old" Sharni then addressed Kyle "Can I assume you didn't read these instructions?"
"I didn't" Kyle admitted meekly.
Sharni continued to read "This potion will allow you to swap bodies with the first person you make eye contact with after imbibing. Duration of the swap is dose dependant and depends on body size" Sharni paused to glare at Kyle then continued "5 ml per 100 kg of combined body weight will cause a swap of approximately 24 hours. Higher doses will prolong the swap. 10 ml per 100 kg will last for 48 hours etc. It is recommended not to exceed 48 hours for a swap"
"Oh dear" Kyle muttered
"Yes, That sentiment is apt. Can I assume you drank the whole bottle at once?"
Kyle just nodded
"That's 100 mL. I'd guess our combined body weight is about 150kg so ........ 7.5 ml per day..... That's probably two weeks worth of swapping"
"Oh dear" was all Kyle could say.