It means that I'll be your friend even when you break out in zits. In fact, I'll even tell them to get lost if I need to. I am convinced that any two people can develop a sexual relationship that builds their marriage. I've experienced it. But, it only comes from giving and giving up rights.
Marriage is a decision to serve one another, whether in bed or out.
Forgiveness is unconditional. Both are to be offered with no strings attached. It is based on the repentance of the offender. We've broken God's laws. We've been unfaithful to him.