I must be lucky. My cat is about 5 and has never peed or pooped anywhere but his box and I don't have to clean it everyday either. Maybe once or twice a week. He's never sprayed. I never housebroke him. He just knew to use the litter box, not sure how that works. He has the run of the house, sleeps on the sofa or my bed, and I let him out whenever he wants out which is usually at night. I think about getting another cat but one is handful as it is. I'm not sure how he'd react either since he has always been alone. He spends most of his outdoor time on the neighbor's porch staring at her cats. She has three beautiful fluffy cream-colored cats--obviously female (he's totally black). They're always indoors and sit on the sill all stuffy and regal like they own the damn place. And my cat jumps up on the sill and paws at them and rubs his head against the glass. He's fixed so that's strange. The females don't appear to react one way or the other. From what I see, cats that grew up with another cat in the house for several years generally need the companionship. If one dies, you pretty much have to replace it. If the cat is a loner, it's probably best that it stays a loner.