Flybye gave some very perceptive application of Erikson's theory. I just finished a presentation on adult development and my group focused on marriage. I looked at how attachment bonds formed as children affect marital success and attachment to a partner. I don't want to go into it all here, but needless to say, considering what a lot of people have gone through as children/teens, it is no wonder that by the time you reach 40, it starts to bubble up.
Personally, I think both men and women have unrealistic expectations about marriage and think it is going to be all perfect without a lot of hard work. People don't know how to be honest and communicate. Throw in endless hours of training, without connecting to your spouse or kids makes it worse. I think the feeling of "boredom" that the men describe is simply the fact that regular daily life does not provide the "thrill" or high that racing/training does. I know that my son who raced ALWAYS said he was bored. He went from one passion to another until he started riding. Then, when he went to college he was bored again and joined the military. It's the constant thrill seeking working here. Now, he's always seeking dangerous assignments, because even the routine tasks of his job in intelligence seem "boring."
I really think this type of personality is attracted to racing; it doesn't bode well for relationships. Of course, I've let my son know this!