"Oh, You're so full of shit!" said Jen.
"So you don't believe me, eh?" Kyle chuckled. "Then you get both. For your transformation, you will become a Dullahan."
"A Dullahan? What's that?"
"A mythical being whose head is separated from its body. And that's what going to happen to you. Your head and body will separate, and exist as separate entities."
"Although your head and body will act as two different beings, they will depend on each other. Your head will be largely unable to move itself, and has no way to use anything except with its mouth. The body has neither eyes, nor ears, nor a nose or mouth. It will be mute and can only experience the world through touch. It can't even eat. Because of this, the body will only be able to see, hear, smell, taste, and gain nourishment through its matching head. The body and the head will have a telepathic connection, and will be able to talk to each other. This, and all of the following traits, will affect your descendant's as well."
Jen blinked. "My descendants?" she asked.
"Oh yes. Your children will be born normally, and will remain so until their tenth birthday. On that day, at around noon, the child’s neck will disappear and their head will fall off, unless it is already on the ground or it is fastened to the body by other means. This cycle will repeat with their children, followed by the next generation, and the next and so on."
"Dullahans will be smarter and live longer lives than regular humans. An average 12-year-old Dullahan will have an IQ 25 to 30 points above a human child of the same age. This will increase as they age. The average Dullahan will live until they are around 500. Starting at 25, a Dullahan's aging will slow down considerably, and they will remain in their twenties for the next 75 years. They will spend the next hundred ears in their 30's, and following hundreds in their 40's. At 400, they will be in their 50's, which will pass in 60 years. After that, their aging will return to normal."
"Dullahan Women will be extremely fertile, and will remain so up until their early-to-mid 400's. Dullahan’s will not be able to conceive until they turn twenty, though they will become active several years earlier."
"Now for their weaknesses. First, they will be genetically unstable."
"What are you talking about?" demanded Jen.
"In this case," Said Kyle, "it means is that a large number of Dullahan children will be born with physical alterations and disfigurements. Missing or multiple body parts, conjoinments, and even hermaphrodites will appear in about 1 out of every five of your descendants."
"Secondly, if the head is killed, the body will lose 4/5ths of its senses. It will be reduced to stumbling about, blind, deaf, and mute, until it dies, either from being killed, or from starvation. If the body is killed, the head will absolutely helpless unless someone else opts to take care of it."
"Two more things before I wrap this up: First, your head will grow a pair of fangs. If you bite another human, they will become a Dullahan. Children under age ten will not be affected until they come of age; everyone else will be affected within a half hour.
"Secondly, every couple of generations, a child will go through a random mutation on the day of their separation. Some will be beneficial, some will not. Regardless, this mutation will have a 1/3 chance of appearing on either or both parts. The traits will be dominant; the children of the affected individual will have a 95% chance of gaining it. In addition, traits will mix. If a persons parents each have different mutations, the person will, again, have a high probability of getting both."
Kyle took a breath. "Now on to the dare. This dare will affect everyone you make into a Dullahan by birth or by bite. First, Your body will lose all forms of nudity taboos. They can wear clothes if they want or have to, but will have any overwhelming urge to walk around in the buff. Second, your body will have an increased libido, and lowered sexual inhibitions. And finally, regardless of your heads sexual preference, your body WILL be bi. When the urge hits, it's not going to care whom it screws, just so long as it does somebody. There are only two rules. 1. The immediate family, and any close cousins are off limits, and 2. Unless it's consensual, you will only go after people appropriate for your age range."
"I believe that's everything. Goodbye Jen, and have a nice life..." Click!
Jen held the phone away from her ear, and frowned. "Weirdo." She muttered as she put it on the receiver. Just as she did, her neck suddenly lost all feeling.
And then, the ground rushed up to meet her face, and all went black...