Prologue:

The first thing you have to understand is that unicorns don't trust people who have sex. They especially don't trust those who seem to revel in it which has led to a certain level of mistrust they have in all humans particularly human males. However, they don't have any problem in those who are too young and too innocent to have sex as well as those who don't have sex through choice and strength of will. However, an increasing common occurrence had led to deep unsettlement amongst one particular herd of unicorns.

This herd had found themselves a nice forest in the north of Scotland that was remote and peaceful. However, as time passed a group of humans settled themselves in the nearby hill and valley and had begun constructing things. At first, the unicorns watched with interest and caution as a town was built and a majestic castle rose. But as time passed, more and more humans flocked to the area and the unicorns withdrew deeper and deeper into the forest. However, the human were getting more and more clever and began herding the unicorns out of the forest once a year to parade them before a number of the young ones. Here the unicorns split into two groups, one which was frankly tired of humans and knowing of their reproductive habits (this group moved deeper into the forest and wasn't seen again for several centuries) and the other which liked the more open feeling of outer forest and was willing to put up with humans every once in a while as long as the humans didn't insist on anything more than that. Now this group had been getting along perfectly well for several years when one day a foal just beginning to silver came running to the clearing completely panicked. Over several hours, the elders managed to determine that this foal had been with the group who had been with the humans today but beyond that all they could get from the young one was that there was something wrong. The elders pondered this while they waited for the rest of the human group to arrive, sure that cooler and older heads could explain what had happened. But by the next morning the rest of the group had not returned. So, the elders sent out a group of the wisest and calmest amongst their number to determine what had happen to the others. This group moved quickly through the forest, planning to go where the humans always congregated but they found the previous group first. They were huddled close together clearly leaning on one another for comfort. When the leader of the new group inquired into what had happened, all the others could say was, "It was different, we didn't understand it, but it was different." The leader of the new group couldn't decide what to make of this and elected that two of the strongest would go back with the first group while the others would stay and observe the humans.

The leader didn't have to wait long after the others had left for down from the castle came the one adult(not-pure) and the group of young(pure) but it was in looking at the young that the leader noticed something off about one of the young. It was pure but not in the same way the others were pure. Something about looking at it made the leader's eyes turn away. It was pure but unlike the other who all carried the potential to be unpure or to choose to be pure, this one wouldn't and didn't. The leader couldn't understand it. The leader gathered the entire group together and led them back to the home clearing where they quickly relayed all they had seen to the elders. The elders pondered the information they had been given and decided to send one elder and the leader of the group back to observe the odd human young to determine its difference. And observe they did, they watched through the years as the odd one grow and stayed pure but not true pure throughout its years. Finally the odd one was no longer seen at the castle and the unicorns hoped that it was the end. But a couple years later there were more of the pure but not interested. And while it was not the case, every year it seemed like there were more of them and they never stopped being strange and hard to look at. So, eventually, this herd of unicorns left this forest to seek out far-off lands where there were no humans of any sort. But before they left, they warned the other herd of the strangeness of these humans and though their cousins laughed, they did not laugh and did not forget.

After this time of migration, the unicorns of the forest (that would one day be called Forbidden), were rarer and only seen in the deep woods for many centuries. Meanwhile, amidst barren lands and across a great sea, long and lanky creatures started to thrive in the frozen tundra, eschewing human contact except for the occasional surprising attack. And this is how it is so that unicorns came to the forest, encountered their first asexual and fled to the tundra of Canada to avoid it and all other humans. While there, they took on a shape that would become known as moose and over time lost their aversion to humans but they never forgot the strange ones.