To some degree guys are just as faithful as their options. If you leave a guy with fewer options, he is less likely to cheat on you.

How would you feel if I told you that your guy  cheated on you because you are an ugly, overweight, boring, lousy lover who can’t get anything right and even though your guy  tried to make things work, your old-fashioned, sexually stubborn self never agreed to compromise? Ouch! That sounds pretty harsh. It’s just a lot easier to call a guy  a pig!

The problem is that sometimes people are quick to point the finger at others rather than analyze why the individual cheated. Maybe your own actions had a big role in pushing the other to the brink of temptation.
The common belief is, “I’m not a bad person”. I don’t need to change, I’m not the one who cheated. The result is that the whole process repeats itself without being rectified, which is probably why so many guys and girls  complain about having been cheated on in so many relationships.
So why do people cheat? The answer is quite simple. People do not cheat because they’re pigs, sows, bitches, or dogs. It all comes down to two basic drives: the physical sexual drive and the emotional need.

People usually cheat because there is a conflict between their physical and emotional desires. By accepting and understanding these shortcomings — instead of ignoring them — we can hopefully work harder to make sure that our partners are satisfied enough to resist any instinctual sexual urge.
The question you have to ask yourself is which drive is stronger, and which one has a bigger influence in your life. In general, each person is different, but it is generally the physical sexual drive that dominates a person’s actions.Why? Because this drive has been present in human behavior for millions of years. Whereas the emotional  need has only been around for a few thousand years, obviously a few thousand years of emotional needs will not overcome millions of years of one’s evolutionary sexual drive.

When a guy falls for temptation, he might forget what attracted him to his girl in the first place, and lose sight of the chemistry and infatuation he once experienced for that girl. It is a delusion to believe that a relationship should always progress smoothly on the road to eternal bliss. However, focusing on the negative will lead one to perceive that they are so miserable that they seek to fulfill their needs elsewhere.

Cheating is simple! but a relationship is more complicated. Cheating usually offers instant gratification, physically and emotionally. A relationship requires lots of maintenance. Giving it care and attention along with trust and communication will continuously help both people grow.
So if you become involved with another person, you owe it to yourself and your girlfriend/ boyfriend to be honest. Creating lie upon lie will only hurt everyone involved. Take a close look at your relationship before seeking happiness with another person.