Kirsten Dunst And Johnny Borrell Are Over
It seems that Kirsten Dunst is a neat freak and Johnny isn't and that's why they broke up. See, I'm on Johnny's side here because I'm sure he had no idea by simply looking at Kirsten that she was a neat freak. People who are anal about their cleanliness do not usually walk around barefoot and braless and drunk off their ass in public. I can see where he thought that her disheveled personal appearance might also mean that she was lax about certain cleanliness topics at home as well. Combined with the fact that she enjoys the affections of more than one person at once would also indicate to a casual observer that germs and the spreading of such were not really high on Kirsten's list of things to shy away from. I can see where Johnny may have been confused by Kirsten's sudden declaration that she just couldn't handle Johnny and his mess any longer.
I think the main reason she kicked him to the curb is that she couldn't afford to keep supporting him. She doesn't have Jennifer Aniston money so to have a boy toy at home is not something that is really in her budget. Added to that fact is that if she is with one guy too long she feels like she's missing out on the joy and satisfaction that only multiple boyfriends can bring to her life.
The fact that Johnny has talent and she has none probably didn't pop into her head.