@ernst Ah, I see. Thank you ernst for clarifying.
What a coincidence - I've just finished your book, Graha Sutras. It was one of my best reads!
May I inquire whether all the basic principles are required to be met, or is just one sufficient?
- Should both the Sun and the 10th house be influenced by Saturn, with neutral planets in the 1st house and same gender planets in the 7th house /or neuter + opposite gender planets in 7th house?
Or would it be acceptable for any one of these conditions to be met—either Saturn influencing the Sun or the 10th house, or neutral planets positioned in the 1st house with same gender planets in the 7th house /or neuter + opposite gender in 7th house—to proceed?
- Should this be verified against multiple divisional charts or just one? If only one, which one should it be?
Is there are specific signs or nakshatras of Saturn, Sun or Moon to consider?
@ernst Is it correct to say that if certain yogas or factors are present in a chart, then the Saturn-Sun/Moon and 10th/4th factors should not be considered at all?
Just for better understanding. A sample chart:
[Tropical Rasis with Sidereal Nakshatras] : https://ibb.co/RQgkZYy
This person has Saturn aspecting the Sun and the 10th with over 40 virupas, a neutral planet in the 1st house, and a male planet in the 7th house.
This close male relative is completely straight but struggles with severe OCD, including types like religious OCD, sexual orientation OCD, and incest OCD, excessive organizing, perfectionism. This ocd causes intrusive and distressing sexual thoughts about family members, gods, and people of any gender. This OCD also causes unnecessary thoughts like "What if I'm homosexual?" even though he knows these thoughts are irrational - These unnecessary repetitive questions stem from mental health issues and are not related to actual sexual orientation. This is how this mental illness "OCD" operates. For example, if there's a red car present, his OCD might make him question, "What if it could actually be green and he's wrong?" even when he knows for certain that it is red and he is not wrong. These types of "sexual orientation OCD" are common in individuals who are completely straight OCD patients.
May I ask a 1-2 questions, please?
1. He is completely straight individual. Are there any factors in the chart, like something related to venus or other planetary factors - if present that mean we should totally ignore Saturn/Sun/10th factors? So, what would the relevant factor be in this chart?
2. From a young age, this person, he has a strong attraction to the opposite gender and is easily drawn to women, showing a clear weakness for them. He always has women on his mind. Which placement in the chart could be causing this?
3. He experiences unwanted sexual thoughts about family members, gods, and any genders, causing unnecessary thoughts about his sexuality and significant distress, even though he knows these thoughts are irrational and that his OCD playing tricks. This is how this severe mental illness works. He been suffering from last 7-8 years. What specific placement in the chart you think would causing this?
Just for better understanding - I came across your post and noticed he had three factors matching. However, you clarified that these basic principles [satn aspect sun/moon - 10th/4th] alone don't reveal anything. So, I was just curious to know if there is any factor that, if present, would mean we should completely disregard the Satn aspects on Sun-Moon - 10th/4th factors - If could provide some insight using the chart above.
These are not simple things that can be said, this does this, each of your question is a course of things that can cause these types of things. Its not a one thing does this, many many things can cause a person to think of sex all the time. Start by using the Marriage and Sexuality yogas in kala.
@ernst Just have two final questions for clarification. 
I apologize for the inconvenience and thank you for your patience. I would like to clarify that my questions are intended solely for the purpose of ensuring accuracy and comprehensiveness in our discussion, not to be repetitive.
Got it. I’ll look into the marriage and other yogas in Kala.
To keep it simple;
1. The person is male heterosexual and has all three basic principle : Saturn aspects 10th & Sun, with a neutral planet in the 1st house and a male planet in the 7th. Is it correct to say that basic principles alone can't reveal or predict anything, and that other factors must be completely considered to make any meaningful conclusions? A simple 'Yes' or 'No' answer will help.
Because in one of your previous responses;
"I am sure that other factors will have to be pinpointed to decide when a person is certainly homosexual."
you mentioned "I'm sure," which seemed as if you're expressing a feeling not certainty, and this left me somewhat confused.
2. What to consider if there are no placements in the 1st and 7th houses? Would it be considered:
a. Neutral or opposite gender planet aspect to the 1st with over 40 virupas.
b. Same gender, or a combination of neutral + opposite gender planet, aspecting the 7th with over 40 virupas.