This isn't really a surprise, though. For those of you who have siblings, think about how you got along with them when you were growing up with them in the house everyday vs. when you moved out, went to college, and would go to visit them. For me, my brother and I got along WAAAAAY better after I went to college 'cause (a) we didn't have to see each other everyday so we had time to miss each other, and (b) if either of us started to annoy the other, it didn't matter so much because I'd be heading back to school after a few days anyway!
This is why it's always a great idea to make sure you have your own "man space" in the house where she can't go. My parents were happily married, with one of the reasons being that any place they moved, my Dad (R.I.P.) had either a garage or an extra room in the house he could make into his own "man space" to retreat to whenever he needed alone time - and my Mom was smart enough to know he needed this and obliged with no argument! As for me, I was always of the thought that it would be better for two people to get married but still have their own places so they could continue "dating" while married.
Something like living in the same apartment building but different apartments (preferably on different floors) could make a HUGE difference in the number of couples that stay together long-term. For one, it allows for intimacy without constant attention - you live close, but you're not always up under each other, so you get time to yourself AND time to miss the other person (and when you want to see them, they're right upstairs). Two, it keeps some of the mystery in the relationship that's HELPFUL to staying attracted to each other. For example: a lot of women who live with their men leave the door open when going to the bathroom, or wake up looking like crap next to their man. This couldn't happen if she had her own place and could get made up BEFORE coming down to my apartment in the morning. And three, if both people had different ideals about how to keep their place, it wouldn't interfere much with the relationship. I once dated a girl who was GREAT in bed (one of the best I've ever had), but her place was ALWAYS messy. Which made me ponder: would I be willing to have amazing sex for the rest of my life, knowing that it would always be in a place full of clutter? Of course, this wouldn't even be a question if we had our own places - I could go see my wife in her messy place, bang the mess out of her, and then go back to my clean apartment - and therefore wouldn't be a source of stress in our relationship.
But, of course, the number of women who would agree to this arrangement are probably few and far between, lol...