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It happened on a Wednesday. First information was gently inserted into everyone's mind, information about what would soon occur.
Going forward people between approximately the ages 18 and 25 would undergo a sort of second puberty: they would develop into fully functional hermaphrodites. The majority of people will have this hermaphrodation occur between 21 and 23, with only about 5% having it occur before 20.
For males this would take the form of developing breasts, loss of chest hair above the bottom of the rib cage, a slight widening of the pelvis and obviously the growth of a second reproductive system, a female one. This process generally takes six months, though breast development may continue sporadically well into one's late 20s.
For females, the main physical changes would be mainly limited to simply developing their male reproductive system, with few or no other visible changes. Development of the male reproductive system generally takes only three to four months for females.
These however are only the most common outcomes, and the tail of possibilities is long. For instance, it is entirely possible, for example, for a male to end up with an entirely feminine appearance by the end of this second major sexual development period. Or the opposite for someone born female, or anything in between. A person's desires can have an influence on this, so for example, a closeted trans woman is more likely to end up with a feminine appearance. These outliers may take a year or more to fully change into their new appearance. Though the majority of people do follow the rules above.
The last thing that changes is sexual preferences, those attracted to men gain an interest in breasts on men. Everyone gains new urges and reflexes related to their new parts, and mostly gains an interest in the parts they were formally uninterested in. These are again generalisations, other outcomes are possible, rarely some may find their orientation changing, some may become bi, others may go from straight to gay, or the opposite, such cases would be rare.
Everyone ends up with a dual libido, that is, it is possible to be aroused with only one's male parts, or only one's female parts. In fact at some point their body will "lock in" to one or the other, releasing a pheromone signal that will cause their partner to "lock in" to the opposite. Once someone locks into female "mode", their male parts would pull almost entirely into their body to get them out of the way, much the same way they do in the cold.
The change that came was that everyone in the world would be altered as if this had always been the case, so those over 25 would all rapidly change into the hermaphroditic version of themselves, and those between 18 and 25 would land at some level of development of their new characteristics.
The warning given also included information that, at least in this initial change, people's relationships would be taken into account. So it would mostly avoid leaving those in love unattracted to their partner.
Clara had been working from home when the warning came. The first thing she did was check the internet to verify she wasn't losing her mind, after seeing mentions of the strange mental warning popping up she sat back in her chair and stared at the ceiling.
There were still ten minutes before the actual event if she remembered the time the warning gave correctly. At 27, she was
going
to change the fast way, and she wasn't at all sure how she felt about that. In ten minutes she'd have a dick, she'd like boobs, and there would eventually come a time when she was pleased to find only a wet vagina ready between her partner's legs.
She couldn't imagine it. She was very much straight, she knew generally what made a woman attractive to men, but it didn't really seem real to her. Her fiancรฉ, Oliver, told her she was attractive, but she didn't see it: she was chubby. He told her he liked her as she was and that the little extra she carried had accumulated in areas exaggerating her natural hourglass shape; she didn't get it, it was so foreign to her.
She sighed and stood from her chair and headed to their bedroom. If she was going to change, she wanted to see it happen. To that end, upon reaching the room, she closed the door so she could use the full-length mirror on its back and took off her jeans and undies.
A quick glance at her watch told her that it wouldn't be much longer, so she stood, feet a little more than shoulder-width apart, wearing nothing but a white tank top and a comfortable bra, staring at the mirror image of the space between her legs, waiting.
Then it began. She saw a little nub form above the top of her vulva, and it started growing surprisingly quickly; the head formed, and two little other nubs formed attached to it. Then there was a moment of discontinuity like the world had skipped a beat, she felt something strange, and her gaze went up to her own chest. She felt very odd, noticing things about her own body in a way she had never done before.
By the time she managed to clear her head and get her attention back down to her crotch, the changes were done. She could feel the weight of it, already semi-erect, hanging off of her. She had been expecting that.
Then her mind caught up with how she had been feeling about looking at herself. She was
attracted
to her own reflection. Her own boobs, large and full, hanging made a beautiful shape, the curve of her waist, the swell of her hips. It was like she had never seen a woman before...
She was into women now.
She was on the edge of panic, floating in a semi-detached state of mind, staring at her own reflection. Imagining it wasn't her, just different enough to be someone else and she felt arousal. The new male arousal, a surge of pressure inside her new dick as it hardened a little more. The old familiar female arousal, a little warmth, a little wetness.
She tore her gaze away from her own reflection, closed her eyes and took a breath. She pictured her fiancรฉ. Still attractive... but something was missing. She mentally added boobs, and that did it, she wondered how big his were....
She stopped again and breathed. She was bisexual now. She had
not
expected that. She pushed down her discomfort with the idea. She didn't like it. It wasn't her, she wasn't... Not that she had a
problem
with bi people... just that she