I think an interest issue to point out is the lack of male understanding of the male mind. Men always claim to not understand women and vice versa, however the average man only has a tenuous grip on our own behavior. We all know what men do, but we don't ever take the time to look why we do it. Women seem to understand themselves better.
What makes us a man and why do we work that way. (, I have a pretty good idea of it, but I think this would be an interesting discussion)