I wouldn't go as far to say that every Scorpio Venus/Taurus over the 8th house/Venus at a Scorpio degree (8, 20) (either women or men) have a Madonna-whore complex, but there is a similar pattern that is happening. A lot of them either find someone cute, hot and are attracted to them, but struggle with developing proper, real feelings, because the attraction is overwhelming them. OR they have real emotion for someone who they are just not that physically attracted to. Which I think is why they could struggle with loyalty or betray someone, they are very much "divided" internally themselves.
On this point, a lot of Scorpio Venus/Taurus over the 8th house/Venus at a Scorpio degree (8, 20) have "unavailable" Moon sign, usually there is Moon Uranus aspect, Sagittarius Moon, Aries Moon or Moon Saturn aspect, Capricorn Moon that makes them emotionally unavailable or disconnected from their emotional world, which is why their attraction feels taboo.
Furthermore, they get plenty of chances throughout life to be together with really attractive, hot people, yet they are too insecure about their own physical appearance to actually develop real feelings for that person, they prefer to let them go. They tend to have self-worth issues that go deeper than insecurity, to being insecure about the type of clothing and how much clothes they have, how much money they earn, the aesthetics of their home, car, how much they can provide, their social network and friends.
Also, they tend to repeat the previous relationship(s) with the next, new one. They just continue what they were doing before, making it seem like the connection is not special. Going to the same restaurants, galleries, watching the same TV series, basically the same traditions.
I think the placements that really compare themselves the most are Gemini/Virgo over the 8th house, Pluto over the 3rd house, Pluto in the 6th house, weirdly Libra Moon (I believe, because it's sidereal Virgo Moon). They will compare randomly with a close friend, their sibling, cousin, the in-laws, a person on social media, a schoolmate, co-worker, especially when it comes to cars, education, knowledge, jobs. They also compare themselves in the most random moments.
I think in little ways both 8th and 12th house show how they will treat you after they are done with you. For example:
Leo over the 12th house: they will say you seek their attention after every time you do something that they dislike or don't approve of
Virgo over the 12th house: they turn very overly critical of you, they nit-pick apart your job choice, clothing, your natural features, everything will be criticised or they will express that they are deeply dissatisfied with you
Aries over the 8th house: they won't try to calm you down after an argument, they will just leave and let you calm down on your own
Taurus over the 8th house: they turn very unemotional, instead straight-up logical, also definitely tries to pretend like they never liked you in the first place or like you never existed
Cancer over the 8th house: they retract every emotional support or emotional validation, won't try to understand you emotionally anymore, instead listening only to their feelings, also will start having invisible beef with your family or dislike not only you, but your family members as well
If you ever doubt if they are cheating, just look at which signs, planets, degrees are in your or their 12th house, honestly there is your answer always. Usually it corresponds to the other person's Sun sign or they have that Sun - personal planet aspect.
You have heard that 8th house Synastry is raw, passionate, authentic. While this is true, something else is also true at the same time. I would argue a lot of 8th house Synastries share common themes: you met in work setting or any formal, public setting, even educational, some elements of the connection are forced or give off the feeling of being arranged.
Leo Chiron and Chiron at a Leo degree (5, 17, 29) get hurt in dating the most, their dating life tends to be public as well. The public knows the good and the bad things happening in their dating life.
I think why Selena Gomez seemed so obsessed with Bella Hadid for decades is because she has Saturn in the 7th house and Bella Hadid is Libra Sun. She wishes to be more like her in the future. She sees her as intelligent, poised and beautiful (Libra) which is how Selena wants to be perceived as, but she mastered it only after her Saturn Return.
If you have Cancer Moon, Moon in the 4th or Cancer Venus, Venus in the 4th house you could end up with or marry a partner who is younger than you. But if you have Capricorn Moon, Moon in the 10th house or Capricorn Venus, Venus in the 10th house you could date younger when you were young too, but could still end up long-term with someone older.
We are all looking at Pisces Moon for how emotionally chaotic they are, but I believe Sagittarius Moons are just as equally emotionally all over the place. Very similar traits to Pisces Moon, escapistic tendencies, especially travel, but also substance overuse (especially alcohol), too much sugar, the oversleeping, watching films, isolating themselves, experiencing unrequited feelings. They find it very hard to decipher what they are feeling in the moment.
Saturn in someone's 8th house Synastry is no joke. You might think it's nothing, because it's a generational planet. Until you have a situationship or a very short-lived connection where you are still dealing with the ending, the breakup for the next 10 years after. The aftermath and consequences of this connection are insane. Y'all are arguing about that one exchanged birthday gift after 5 years. Also, what you saw about them while the connection was still active, the public will be able to see and recognize in 10 years time, you just saw it first.
