(inspired by Valentine's "Unintended Consequences")

The advent of cheap genetic testing had made many changes in society. The biggest came when an overly conservative right-wing political staffer came across a demonstration device at a convention. It simply checked the "sex" chromosomes and reported them.

The politician the staffer worked for had been fighting a non-discrimination measure in the state legislature. As usual, he was calling it a "bathroom bill" and claiming it would let perverts invade women's restrooms.

Upon seeing the demo device, the staffer had inquired as to how much they'd cost if they were mass produced. The company rep at the table was somewhat upset at the idea, then he thought about it and made some calls.

The estimate came back as "less than $100".

The staffer contacted his boss and within weeks they'd gotten a firm quote and managed to put together a bill to require the testers at all public bathrooms, changing facilities, etc. With some funding to help pay for them. And, it managed to pass (Let's hear it for bigotry!)

The company had been reluctant at first, but when the representative who'd been at the convention explained his take on it management agreed that it was a worthwhile project. Besides the wall mounted units, they also (on their own initiative) produced portable units.

There'd been a lot of protests, but oddly some of the larger LGBT groups had been silent about it.

Came the day the law took effect and the sex-based access units were turned on.

As expected, a lot of trans folks got into trouble.

Then other people started getting flagged. Lawsuits sprang up.

When the dust cleared, the public had been forcibly educated about the fact that a significant percentage of the population weren't XX or XY. And that many who were XX or XY didn't have the expected body type or genitals for their "sex".

AIS/CAIS "women" were hard enough for the idiots to wrap their minds around. But the fertile XY "females" really broke their minds.

To say nothing of the folks who weren't XX or XY (which, due to the way the politicians had wanted the testers programmed, hadn't been able to use mens OR womens bathrooms)

Anyone who attempted to sue the company was referred to the politicians. "Our devices properly reported the chromosomes. What was done with that info is the responsibility of the people who wrote the stupid law."

It was a major loss for the narrow-minded bigots. And the hard data on just how many people didn't fit the "there are only two sexes, with XX=female and XY=male" paradigm ruined a lot of the "normal" arguments about restricting t-folk from bathrooms and locker rooms.

Mind you, it didn't shut up the most extreme bigots, but then, what would.

But given that so many people now knew that someone they knew wasn't genetically the sex everyone had always assumed they were, a lot more tolerance was seen.

The testers on doors went away. But the portable units wound up in most delivery rooms and many doctor's offices. As well as many other places.

The company weathered the storm. And it wasn't until later that it came out that they'd expected the trouble. Heck, they'd counted on it.

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Just a note: there really are fertile XY females. I've got a copy of a paper about a third generation one. Subject, mother and grandmother were all XY.