Originally posted by SpencerTheLion:
...yes, it seems females are more territorial and tend to like high perches more than the males, esp. calicos. On the spraying thing, I suspect if they are neutered early and have plenty of territory there is less urge to mark things.

Oh, how I wish that it was true. Patches was already spayed when we adopted her at six months of age. She has sprayed whether she was an only cat, with another cat or two cats. She has ruined my carpeting and just this morning after feeding her and giving her lots of time on my lap while I was at the computer, she jumped down and sprayed on a door - just a few feet from me. She has a whole house and a large enclosed yard and she has marked it all well. I think I said, she is just like having a problem child that you dearly love.