Cheating is a betrayal of trust, and what that means is unique to the relationship youre in. In short – cheating is a big deal because that person has overstepped already established boundaries that they agreed with when entering the relationship (or agreed with through the course of the relationship).

How common is it to cheat on your spouse?

Cheating is not very common at all; fewer than 25% of men admit to having cheated on their spouse, while at least 15% of women admit to having cheated on their spouse.