9. You have to admit it right away if you cheat
First of all, there aren’t many men who are going to admit that they cheated on you just because you made a rule that says so. And if they did promise you and they now do admit they cheated, your relationship is now in jeopardy. A rule is not going to prevent him from cheating or ensure he’s going to tell you that he did. And making a rule like this just introduces the idea that you expect or fear that he’ll cheat, making you seem insecure and suspicious.