There is quite a lot already written on this forum about YODs. May I say that for those with a natal YOD, you may not truly `get' it until the YOD is activated - that is, until one of the planets in the YOD is activated by a transiting planet, or else one in progression. It is when this occurs that a crisis usually arises, and it is as a result of this crisis that the person needs to be patient and work out what the `right' thing to do would be. To force a solution simply to bring about a quick resolution - and to break the tension - is not the best idea. It is within this tension, which can last from months to years, that the YOD person finds the strength and wisdom which the YOD is pushing them to develop. A YOD is part poisoned chalice, part Great Gift. A hasty and ill-timed decision during a `YOD crisis' can result - eventually - in a fundamental maturing of the individual, as easily as it can lead to total ruin.
[And I wrote a lot about this at the time it was occurring, but my son - who has a natal YOD formed by a sextile between his natal Moon and Jupiter, both inconjunct Mars - had a major YOD crisis in 2008-2009 when tr Uranus became conjunct his natal Moon (in the 5th house). He lost total contact with his (then) 2 year old son when the other grandparents of the child decided to cut him out of the picture altogether. He was pushed to the limit during this time, wanting to sort it out in all kinds of risky ways. In the end he chose the letter of the law - he has Libran Sun and his YOD apex Mars is also in Libra - and not only did he regain access to his son, but after much online research he learned a vast amount about the Family Law Act in this country, and so was able to take back his own power in the situation. Better still, 7 months ago the mother handed over the child to him and now he has full legal custody which is unlikely to be challenged. The life wisdom he gained through this years long struggle would not have been gained had he not been patient, persistent, and learned to trust his own considerable instincts. There were times when he wanted to give up, and other times when he wanted to take violent action, but without patience and persistence he would not have had the outcome he is now enjoying.]
For me,
The Yod Book by Dutch astrologer, Karen Hamaker-Zondag has been my go-to resource on YODs, and it wasn't until I read it that I began to `understand' YODs, and fundamental to understanding them is coming to grips with their purpose on a chart.
There have been some valuable discussions on this forum on the subject (after all, this is designed to be a teaching/learning forum), and most of these took place a number of years ago. Here are some links which you may wish to peruse.
http://www.astrologyweekly.com/forum/showthread.php?t=15271
http://www.astrologyweekly.com/forum/showthread.php?t=19362
The first link is to rather a long thread, but it is worth reading through.
The second thread deals exclusively with the sextile between Neptune and Pluto.
Given the long sextile between Pluto and Neptune, there a lot of people born during this sextile who also have natal YODs with the Pluto-Neptune sextile as the base of the sextile.
And conspiracy theorist, thank you for beginning this thread.