When two Geminis get together, they form one of the astrological duos that are most likely to cheat on each other. And this has a lot to do with their inherent personality traits. "This sign is represented by twins, which means duality," author and Vedic astrologer Susan Shumsky tells Bustle. "Duality is the opposite of union and oneness. Oneness and loyalty in the face of adversity is what makes couples last. Duality and inconsistency makes couples fall apart." So, you can see where this is going...

While they can make it work by remaining aware of these pitfalls, it can be tricky. "Geminis tend to be [....] fickle in their emotions," Shumsky says. "Their minds tend to wander. They are always looking for the next big shiny thing." And that can lead to one or both people seeking out an affair, even when they try really hard not to.

Aries can be a naturally self-centered sign, which is completely fine — but doesn't always bode well when it comes to relationships. When combined with Cancer, a sign that "can be especially vulnerable, overly sensitive, and susceptible to the domineering personality of Aries," it can create a rift in the relationship that leads to cheating, Shumky says. "Aries might cheat to feed the ego, and Cancers might cheat to find the emotional support they need."

One thing Libra is known for is their indecisive nature, as well as their tendency to be overly-critical and fault-finding. "Though they are ruled by Venus, the planet of love, they aren’t necessarily loving if they feel hurt or victimized by others," Shumsky says.

When they date Capricorn — a sign that is all about business — things can quickly go wrong. Capricorn tends "to be driven to succeed in work and might be insensitive and insulting in the way they communicate," Shumsky says. "Both signs might be very critical of each other. Libras might find this grating and therefore might reach outside the relationship to seek comfort. And Capricorns might cheat in order to get ahead in business."

When two Scorpios pair up, their passionate, sexual energy can go into overdrive. "There will be plenty of sexual chemistry, but that might burn out after the initial fascination and infatuation runs out," Shumsky says. In many cases, it's not always enough to keep this duo together.

Once they pass the honeymoon stage, "they might look for sexual variety elsewhere." But if that doesn't do them in, their fiery personalities might. "Scorpio is a water sign, highly emotionally volatile, and extremely stubborn and unbending," Shumsky says. "So with two Scorpios in the same space, arguments, name-calling, and door-slamming might ensue. These explosive emotional incidents might result in infidelity."

When these two signs try to date, they may end up clashing "because of their rigid attitudes," Shumsky says, "Aquarians need to be right and need to be free, and Tauruses need to be loved and need security." Both feel very strongly in what they want, and are unlikely to bend in any way.

Taurus is ruled by Venus, the planet of love, and is always on the lookout for comforting and traditional relationships. Meanwhile, "Aquarius is ruled by Uranus, which is the planet of innovation, forward thinking, and progressiveness," Shumsky says. "Aquarians can be rebellious, iconoclastic, and irresponsible. Therefore Aquarians might stray to find variety and excitement, while Tauruses might stray to find the attention they crave and security."

Due to their personality traits and mismatched desires, these signs don't always do well when it comes to long-term, monogamous relationships. They can make it work, if they try really hard, but it may be an uphill battle.