You know, there are a lot of reasons why men stray, but one that the media just won't talk about is that straying is just "exciting", "naughty", "forbidden". The lure of forbidden fruit is very strong. Not every straying man is unhappy with his marriage. As a matter of fact, we've seen this happen time and again in the church. A number of men who stray at mid-life are more unhappy with themselves than with their spouses or marriages. Unfortunately, no "one" person can make another person completely happy.
In the above cases, the reason the marriges were able to get back on track is precisely because the men recognized their sinfulness and DID NOT blame their wives for their own actions. Contrast that with sitting through 2 years of pyschobabble disecting a marriage to see "what went wrong with it".
Some marriages need that kind of help; at the same time, I think that kind of help probably destroys a few marriages that would have otherwise remained intact.
Just something to consider.
Not picking on men.....women are a whole 'nother topic.