Synastry: Hottest Aspects Ever

Whether it's for a one-night stand or planning to tear some sheets for a while, astrology is a powerful tool for analyzing sexual attraction. Actually, as an astrologer, I can tell you about sexual chemistry at a glance at your synastry chart.

This post is not about long-term relationship potential. This one is purely about sex, lust, raw attraction, and how hot your connection can be with a certain someone. So grab your synastry chart and let’s dig in together, shall we?

First, and most importantly: For any hot aspect to work properly, personal planets must be in touch. No matter the nature of the aspect, for you two to even notice each other, initial recognition is required. The first columns of the synastry table cannot be empty. This means some Sun-Moon-Mercury connections, and especially aspects to Venus and Mars need to be present to get anything going. House overlays in the 1st, 5th, 7th, and especially the 8th houses also imply attraction.

The following aspects spell hot SEX, but they do not act alone. A combination of several factors, particularly connections between personal planets, is essential.

To better explain, think about it this way: Some people have aspects between personal planets and outer planets like Uranus, Neptune, or Pluto in their natal charts, making them naturally magnetic and sexy. Now, because these outer planets move slowly, many people born around the same time create similar aspects with them in synastry (For instance, someone with Venus conjunct Pluto will have Venus-Pluto synastry with most people born within a few years of them).

Obviously, they're not attracted to everyone their age. They'll only manifest the strength of these aspects in synastry when personal planets moving rapidly are connected. *As a guiding note about the power of these aspects in instant attraction: use tight orbs. Wider orbs unfold over time.

Venus-Mars Synastry

The planet of love and beauty meeting the planet of drive and passion. Both Venus and Mars move quickly (orbit relatively close to the Sun), creating a personal, unique touch between two people.

This is it! The conjunction is the holy grail of aspects that makes you unable to keep your hands off each other. Any Venus-Mars aspect is hot in synastry and will probably make you absolutely tasty to each other.

Well, except the inconjunct. Some may like it, but generally Venus-Mars inconjunct implies incompatibile. Different sexual desires and styles in an awkward aspect. But it will still count, as I said initially, if other aspects come into play.

Without any Venus-Mars aspects, a relationship can still be hot due to other factors, but noticing these aspects means sexual chemistry is definitely on the table.

Moon-Mars Synastry

Heart + drive = passion!

When harmonious, the Mars person sees the Moon's sweetness and wants to merge completely with them. The trine is directly related to that nurturing, protective urge, and the utter wish to impregnate the other (yes, make babies with them). But challenging aspects can really hurt because Mars is set to shoot direct arrows into the Moon's emotional core, even unintentionally.

This is a very personal, sexy and emotional aspect, uniquely created between two people, as the moon moves about 13 degrees in a day.

Pluto-Venus Synastry

Miss Venus, the soft, tender lover meets Pluto, the dark, dominant ruler of intimacy. This one is RUN-AWAY HOT. Harmonious aspects produce regenerative passion and deep attraction. Emotions run deep and raw vulnerability becomes part of the feast, even in a one-night stand.

Hard aspects, or Venus in the other’s 8th house, are STEAMING hot. Add the forbidden to the mix above. Boundaries become negotiable with no way to stop, the bond becomes obsessive as you get possessive and it may completely consume your mind.

Consume with caution!

Better for people already familiar with Pluto’s power, because once you've had

this intensity, nothing less can ever be enough.

Mars-Pluto Synastry

Primal attraction at its peak. Animalistic. Raw. Pure LUST.

Both want to devour each other, leave no trace, then do it again. Senses are fully aroused. Touch is heaven. Tantric bond. When harmonious, wow!

But when challenging, it can become slow-burning hell. A pressure cooker where control and dominance urges build until it explodes, but you can't ever leave.

The intensity becomes a prison and the power dynamics can become genuinely overwhelming.

Mars-Neptune Synastry

Drive and desire meet the highest octave of love and imagination. Play, pretend and swim in fantasy! Where everything is possible, and touch becomes addictive as you dissolve into each other. Transcendent sex, can anything sound better?

When harmonious, it is dreamy and ethereal.

When challenging, it can be confusing, boundaries become vague and fluid, but the urge to explore remains and you're set to believe the illusions.

You need many softening factors for this to stay playful and not turn toxic.

8th House Overlays

The house of intimacy, Pluto-ruled. Any planet here will go deep, personal, and intimate, psychological experiences meant to transform you. Taboo subjects will surface. You're compelled to open up.

Sun in the 8th house may seem more casual since everyone with that same Sun sign will create this overlay with you (if your 8th house is in Gemini, every Gemini Sun person lands here). However, when combined with other connecting factors, it becomes prominent and intense

Having Moon or Venus here promises intimacy, control and boundary exploration. Jupiter will expand all the 8th house subjects. These overlays spell sexual attraction and deep intimacy, but again, it's an intense Plutonic vibe that is not suitable for everyone. Some may feel overexposed. Some may lose boundaries completely. All will remember for life.

Venus-Uranus Synastry

Love meets unpredictability, novelty, and electric newness. The sparks!

All Venus-Uranus aspects may manifest this way.

One second you say hi, the next you're upside down and surprised in the best way. But that same surprise might not suit the calm, routine types. I have a lot to explain about this aspect going long term but this post is about the sexual act and attraction.

Yes! This one will be shockingly passionate and won't leave you time to be dazed. It's fast, strong and interesting. But it's also unpredictable, and Uranus requires space. As close as you become can be the distance you both feel a minute after.

If you find this amazing contact in a chart, I can say that if you get in bed it will be sudden and HOT, but I can say absolutely nothing about your next encounter :).

Other Sizzling Hot Synastry Aspects to Watch For

Sun-Mars

Raw vitality meets physical desire. Both planets produce heat, and coming together they create sexual combustion. Sexual drive is illuminated and amplified! The Mars person is energized and turned on by the Sun's vitality, while the Sun feels sexually empowered by Mars' desire. Instant chemistry that is often visible to everyone around.

Sun-Pluto

The Sun feels both illuminated and challenged by Pluto’s intensity, while Pluto is drawn to the Sun’s life force. Both powerful, light meets shadow, creating a consuming pull where sex becomes a power exchange, empowering and dangerously compelling.

Venus-Neptune

A sensual dream. Pure love is in the room. The connection that can feel like soul-mate territory. Sex becomes an otherworldly experience, beautiful and intoxicating, but needs grounding to avoid illusions.

Mars-Uranus

Lightning strike attraction. Immediate, physical, and unpredictable. Sexual encounters happen suddenly and intensely - exciting and spontaneously electric, but can be unstable without other stabilizing aspects.

Moon-Pluto

Emotional depth meets transformative power. The giver and the taker. Pluto "feeds on" the Moon's emotional depths. Sex feels like soul-baring intimacy where vulnerability becomes arousing. Every sexual encounter carries deep psychological bonding - you're not just having sex, you're merging souls.

Mars in the 5th house overlay

Sparks fun, flirtation, and playfulness. The Mars person awakens the house person's romantic and creative side, creating playful sexual chemistry that feels both innocent and lustful - joyful desire!

Pluto on the Ascendant

This placement screams magnetic intensity. The Pluto person has a powerful, sometimes hypnotic presence that the Ascendant person cannot ignore. There is a deep, almost psychic sexual attraction that feels like transformation at a soul level. Boundaries can blur, and the relationship can change both people profoundly. This is not casual; it's consuming, and unforgettable.

Venus on the Ascendant

Instant "wow, I want you" factor that's both romantic and lustful.

Classic romantic and physical attraction. The Venus person embodies everything beautiful and sexually appealing.

Mars on the Ascendant

Immediate body chemistry and sexual tension you can cut with a knife.

Pure sexual magnetism. The Mars person radiates raw physical energy that feels irresistible.

Moon on the Ascendant

Emotional attraction and safe feeling that is immediately felt. Sexual vulnerability feel natural and safe, enhances intimacy.

Asteroid And Black Moon Lilith: The Erotic Extras

Black Moon Lilith

This primal point amplifies raw, untamed sexuality and taboo allure. When Black Moon Lilith aspects other planets, the attraction can feel wild, magnetic, and sometimes dangerously addictive.

Eros

The asteroid of erotic passion. Eros connections bring an intense desire to merge physically and emotionally. This is the kind of attraction that feels fated and almost impossible to ignore.

Psyche

The soul’s longing for deep connection. Psyche paired with Eros creates a legendary bond of spiritual and physical attraction that goes beyond surface desire.

Juno

The asteroid of commitment and partnership. Not entirely related to sex

- but then, it does. This one is about long term. While not raw like Lilith or Eros, Juno adds a fated, karmic flavor to attraction, hinting at relationships meant to last or teach important lessons. Even if they don't last, deep down that hint is what we always wish for 🖤.