The same lips we use in kissing we also use in cursing and kisses also come with bruises and roses also come with their thorns in the romance of life. But many people behave like dogs who always return to their vomit.
Unfaithful and ungrateful people often live in denial until when they are paid in their own coin. Have you noticed that the most jealous husbands are the most unfaithful ones?
Unfaithfulness comes in different ways and cheating on someone is not always about sex. Too much lust for sex in a relationship is like too much salt in a pot of soup.