As human beings, we are creatures of habit. Any slight change usually has an explanation. Don't act impulsively. Sooner or later, even the smartest makes a mistake and gets caught.
I come from the school of thought that no man should knowingly sleep with another man's wife. It is bro code. But I know the kind of tumultuous and murderous rage that possesses a man who learns that his wife is cheating on him. Many sensible men know this basic fact of life.