What placements would you say in synastry show that a woman is a man’s dream girl?
I'd check his Venus first. Venus = love and beauty. If his Venus conjuncts her Ascendant, even better. That's a "love at first sight" aspect, although it can be a bit superficial.
I also think these aspects (mostly conjunctions, but trines, sextiles, squares, and oppositions can be good, too) work well with each other:
Sun/Moon Sun/Venus Venus/Mars Venus/Jupiter Venus/Pluto (careful with this! the sexual chemistry will be hard to resist) Moon/Mars Moon/Jupiter Moon/Pluto
Conjunctions are strongest, while trines and sextiles make for smooth sailing. Squares and oppositions can cause tension, but, depending on the placement, this isn't always a bad thing. I mean, imagine the sexual tension with a Venus/Mars or Venus/Pluto square. Whew! 🥵
Planets in the 1st, 4th, 5th, 7th, or 8th houses are the most common in dream person synastry.
I'm going to add 2nd house synastry because while it can cause possessiveness, it's not necessarily toxic possessiveness. It's like, "This is my person. I don't want anyone else to have them." It's great because you can feel secure and safe with this person, like they're your rock.
I'm also going to add 12th house synastry here, too, even though people argue about whether it's good or not. If you have Pisces or water placements, the 12th house could be a really deep, psychic connection. It's also considered to be the house of karma and soulmates. But some people hate the feeling of the 12th house, so the experience is entirely subjective.
I also like looking at asteroids, such as Valentine, Eros, Psyche, Cupido, and Union, especially Sun and Venus conjunct Valentine, Eros conjunct Psyche, Cupido conjunct Cupido, and Union conjunct Union.
If you have your Ascendant or Descendant conjunct your person's Ascendant or Descendant, this can feel like you two have known each other all your lives and have so much in common. This can be a very intense, magnetic pull when these axes line up. ASC/MC and DSC/IC are also good.
Lastly, at the beginning of this post, I talked about the Venus/ASC aspect, but Venus conjunct Descendant is just as potent. Specifically, if another person's Venus conjuncts your Descendant, they're exactly your type. Venus/ASC is more of a physical attraction, while Venus/DSC can feel much deeper and that person is exactly your type. It's a bonus if you or your person's Venus is in the 7th house conjunct the Descendant.
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