The song: "Should've Said No"
And I should've been there in the back of your mind
I shouldn't be asking myself why
You shouldn't be begging for forgiveness at my feet
You should've said no, baby
And you might still have me
Why it works: If a person cheats, it feels like things should be black and white, but sometimes there's a bit of a gray area. In the aftermath, it's all about dealing with the shoulds and should nots, deciding whether to forgive and forget or move on.