I was reading a book that said exactly that: men tend to wander forced by their shame (long story to explain, shame of being inadequate) and own other problems but in the back of their mind, (most of them leave when they have another woman lined up or their eye on, because men, need a woman to live their lifes with) they believe or want to believe they can always go back to their nest... Suprisingly, it also says that women dont need a man to live a complete life after a divorce because they are more capable of nurturing all sorts of R, friendhips, family ties etc and get the love they want. It also says that when a woman leaves, and shuts the door she has thought about it a lot and doesnt count on being able to come back...