wife nagging Tag

I once conducted a marketing training to a group of business professionals. During the training I shared that repetition is critical for audiences to retain messages, and that an individual needs to hear a message at least six times for them to understand and act on it.  I advised these professionals to "repeat, repeat, repeat" their key messages to their customers. As I was talking, one of the training participants popped his hand up to ask a question.  I called on him and he said, "I feel like my wife is always repeating the same thing over and over and over again to me.  But, the more she repeats, the more I don't want to listen or do what she says.  Is there ever a time when repeating gets to be too much? And, more so...how do I stop my wife from nagging me?"