Put in very general terms, cheating involves straying outside a committed relationship in order to have sexual relations with another person or persons. People cheat for a variety of reasons, but there are two main motivations that are almost certainly present in every case. First, the cheater believes that s/he is not getting something she needs or wants from the existing relationship. For example, a person might not be receiving the amount or type of sex s/he wants. As another example, a person might not be receiving the emotional intimacy s/he needs. These unsatisfied needs are what motivate the person to stray outside the confines of the relationship. Second, the cheater believes that s/he is getting something of value out of the existing relationship or is avoiding something undesirable by remaining in the relationship. Obviously, if the cheater got nothing from being in the relationship, then s/he would most likely end the relationship rather than cheat. What the cheater gets from the relationship can vary greatly. One person might remain in a relationship out of love, but stray because her sexual desires are not being gratified. Another person might remain in a relationship for financial security, yet wander because his partner is emotionally distant. A third person might remain in a relationship out of fear of being harmed, yet cheat in order to attempt to have a relationship that is not based on threats and coercion.
While people cheat for a variety of reasons, it is generally desirable to avoid having someone cheat on you. Laying aside the moral harms, cheating is harmful in two very practical ways. First, there is the matter of physical health. There are many sexually transmitted diseases in the world and some of them, such as AIDS, are life threatening. If someone is cheating on you, the odds of you being exposed to one of these diseases increases significantly. Second, there is the matter of emotional health. Being committed and loyal to a person who does not reciprocate this loyalty can be quite devastating when this infidelity is revealed. The extent of this emotional harm increases the more you are committed to the person and commitment tends to increase with time. Given that both the chance of being harmed and the extent of the harm depends on the amount of time on is a victim of a cheater, it is reasonable to think that the sooner a cheater is exposed, the better.
To spot a cheater, you need to know what types of cheaters you might be dealing with. There are three types of cheaters: the traitor cheater, the stealth cheater, and the open cheater. Each of these types will be discussed in turn.
The traitor cheater is the classic cheater. The cheater is cheating with a person who is aware of the relationship that the cheater is violating. This is analogous to historical traitors who secretly betray their alleged loyalties to another party who is fully aware of their traitorous deeds. A traitor cheater can be hard to catch because s/he has a willing accomplice who will probably aid the cheater in concealing the cheating.
A stealth cheater is a person who cheats on one person with another person who is ignorant of the cheater’s other relationship. The cheater is thus cheating on both people because only s/he knows about the cheating and the others believe they are in a committed relationship.
Because the stealth cheater does not have a knowing and willing accomplice, they can sometimes be easier to catch. In fact, one of the people involved with the cheater might accidentally expose the cheat. For example, a person who is unaware that s/he is involved with a cheater might stop by the cheater’s place unexpectedly when the other person is there.
An open cheater is someone who, as the term states, is open in his or her cheating. While s/he remains in a relationship, no attempt is made to conceal the cheating. The notion of an open cheater might seem rather odd. After all, cheating seems to almost require secrecy by definition. However, such cheating does occur and occurs enough that there are slang terms for those who engage in it. People who are open cheaters have been called “swingers” and “players.”
The good thing about an open cheater is that there is no need to expose the person-they are open about the cheating. The bad thing about an open cheater is that s/he is still a cheater.
A single person might conceivably be a cheater of multiple types. For example, a person might be cheating with one person who is aware of his infidelity while he is also involved with a third person who is unaware of the first two. However, most cheaters tend to fall into just one type.