Nothing, cat's don't get "turned on" they do into heat. When they get fixed their hormones levels drop and don't have the need for a male.
Spayed female cats are called just that - spayed, or fixed, female cats.
spayed
A FEMALE cat, until she is spayed or births at least one (1) litter of kittens, is called a Molly by most veterinarians and animal experts. If she is spayed or has had at least one litter of kittens, she is called a Queen. I know this question is old but 🤷🏽♀️
Estrus is the time in a female cats reproductive cycle which the female cat is receptive to the male cat. According to the question posted the cat had been spayed. If the cat has really been spayed it cannot come into estrus. If it has not actually been spayed and you just think it has, then it could come into estrus, but this is not dangerous (except she may get pregnant). Either way she will not die, or at least not of that!
Probably, if you have a female and a male and nether are spayed or neutered.
because it can't get pregnant
Male cats are neutered and female cats are spayed.
Because they have not gotten spayed yet and have mated with a male cat, who fertilized the female and then they had kittens.
Only when you get her spayed (fixed) by a veterinarian.
Female cats get spayed. Male cats get neutered. It's the smart thing to do.
The male cat (every animal) has testicles, unless they are neutered. A neutered male cat will not have visible testicles, but there will be a noticeable space between its anus and penis. A spayed female cat looks exactly the same as an intact female as the reproductive organs that are removed when it is spayed are inside the body. A spayed female will still have a genital opening (vulva) which is often a tear-drop shape located right below the anus.
I know it is more than a male cat. I payed $65 to have Miss Kitty spayed.