I knew my wife for 2 years before marriage, and her real LD did not kick in until the first son was born 2 years after that. So the so called honeymoon phase can last for several years. Also, when people come out of the honeymoon phase, not everyone experiences a decline. It's like when we are all 10's on a sex scale of 1-10 when we are in the honeymoon phase, but after we leave this phase, most men stay up around 8-9's, while many women drop to 1-2's. So in many cases, the honeymoon phase effects only 1 person in the marriage, and not both.