Marital infidelity, or unfaithfulness, occurs when a partner in a marriage goes outside the marriage to engage in a sexual relationship with someone else. Most everyone understands that marital infidelity is not good; many surveys reveal that close to 90 percent of Americans, Christian or not, believe marital infidelity to be wrong. However, statistically speaking, between 30 and 50 percent of Americans will cheat on their spouses. There are a number of reasons for people engaging in adultery, but there is no justification for sin, and its destructive nature must be acknowledged.