Benny was the last one home that day (his mother was a stay-at-home mom.) He hauled himself in the door, exhausted; he'd fallen behind this semester and had had to spend all of spring break catching up on late homework. Dropping his backpack onto the floor, he shuffled off to the bathroom to relieve his strained bladder. Feeling too tired to bother standing up, he sat himself down on the toilet and reached down to do the requisite aiming...
He grasped nothing. That in itself wasn't too alarming; he just assumed he'd missed and poked around, trying to get a hold on his penis. It wasn't until urine started to empty directly from his crotch and splash his fingers that Benny looked down and received the real shock.
Benny's scream was blood-curdling, and it wasn't long until his mom was knocking at the bathroom door. "Benny?" she asked, her concern evident in her voice. "Are you okay in there?"
Fresh screams assailed her ears, and she unhesitatingly grabbed the little key-wire, popped the bathroom lock, and opened the door. Benny was sitting on the toilet, seemingly unharmed, but tears were streaming down his face. "OH GOD," he screamed, upon seeing his mother, "I'M A GIRL!"
His mom had no idea what this might mean, but fearing that Benny might be panicking about some kind of injury to his genitals, she cast propriety to the wind and inspected her son's crotch.
She wasn't sure what she expected to see, but it definitely wasn't what she saw. Benny's penis and testes were gone, but there were no signs of injury; no bloodied stump or tattered remnants, nor any blood, for that matter. Instead, he had what seemed to be a perfectly normal vagina, from a girl in the same very early stages of puberty as Benny himself. In fact, there were no visible signs that things had ever been otherwise.
Benny continued to wail and sob, and his mom decided that the main thing right now was to get him coherent and stable. "It's all right," she comforted. "I'm sure this is just some sort of very unusual medical condition. We'll get this figured out."
It took a while, but eventually Benny was calmed down enough to where his mom was able to show him how to wipe. He was about to pull his pants back up, but she shook her head. "No," she said, "we'll need to tell your father anyway."
"D-dad?" Benny asked, still sniffling. "W-won't he f-f-freak out?"
Benny's mom shook her head. "Your dad's more understanding than that," she said. "He won't blame you for some strange medical condition. He-"
She was interrupted by a loud yell from upstairs. She raced up toward the sound to see what was the matter. Benny followed close behind, pants abandoned on the bathroom floor.
They were met in the upstairs hall by Benny's dad, who was pale as a ghost. He took one look at Benny and blanched even further. "Oh, not you too!" he groaned.
"Dear," his wife said, "do you mean that you...?"
He nodded. "Oh God," he moaned, "was it that note?"
His wife was about to ask what he meant when he darted forward and copped a feel of her privates. She was even more surprised than he was at the sensation of a bulge in her crotch which had definitely not been there that morning.
Shocked beyond words, all three ran to check on Jenny, who was happily playing with Legos on her bedroom floor. Without a word, her mother stood her up and pulled down her panties, lifting up the hem of her jumper to reveal genitals that would have been perfectly normal on an eight-year-old had that eight-year-old been male. "Mommy?" Jenny asked, plainly surprised. "Those are boy parts, right?"
"I think," her father said, voice trembling, "that we need to have a family conference."
The four family members went down to the living room and closed the shades. Benny and Jenny's father explained about the note, which he now knew was more than an ordinary Post-It. Jenny told about rescuing the note from the garbage, although she claimed that the last sentence her dad had recited hadn't been on the note.
"So..." Benny asked numbly, "what do we do?"
Their dad shrugged. "I'm not sure," he said. "We can look for a way to reverse this, but if it really is magic the way it seems to be, I don't think any doctors can help us. It might be a long time before we find a way to change back, so until then I guess we'll just have to go about our lives as best as we can, although we can't really tell anyone about this. Jenny, if you have any questions about having boy parts, Benny or I can answer them."
Benny's mom pulled him aside. "Benny," she said, "I'll be happy to help you learn how to take care of your vagina, while you have it. But I think you should know this: if Jenny was right about that last sentence missing, well, you're at the beginning of puberty. It's entirely possible you might mature into a full-fledged girl."