In my article "Getting down and dirty: Astrology and love spells" from Asteria Unveiled, I first addressed the need for one to study the natal charts of the person they're interested in as well as their own. Or the chart of the client and that of the target, in case of all you money grabbing magicianists out there who want to score a quick buck by doing love spells for people on specific targets.
There is a reason I addressed that in the beginning and you can find more about it by reading that article. The article itself also contains a case study that can come across as livid for many, but it needed to make its way into the book to show more ugly sides of relationships since the aspect in particular is mostly discussed as being generally good for sex. I'm talking about modern astrology forums and such, not by occultists, because the latter are either too busy building a know-it-all facade, chastizing people, making fools of themselves without knowing it, all of the aforementioned and much more, and so on and so forth.
This article offers a case study so that anyone who's read and will read that article from the book will have a practical 101 on this stuff in regards to their initial goal. It would've made the perfect example for the article in the book but alas, I only came in possession of this information right after the book was published.