I'm not a professional, but I have had some experience with cats, and I think the most likely explanation is that Roberto simply does not like female cats.
Female puppies get spayed. Male puppies get neutered.
You can have a neutered male and female boxer without worrying that they will try to mate. The dogs will not mate if the male is neutered.
no
Male cats do not go int heat, neutered or otherwise; heat is a characteristic of the female oestrus cycle. Even a properly neutered male may still respond to a female in heat, out of habit. If a cat has learned to spray before he was neutered, he very likely will continue after he has been neutered. It likely will be less frequent, but it can still happen.
A neutered male can get your cat pregnant up to 30 days after he's been neutered. So if the cat just was neutered, keep him away from your female.
They don't.
There is no way to tell if a female cat has been neutered excepting surgery. Obviously a neutered cat will not come into season.
If female have her spayed if male have him neutered
If they aren't neutered, yes.
Male cats are neutered and female cats are spayed.
No, and a female rabbit is spayed.
Probably, if you have a female and a male and nether are spayed or neutered.