Most male animals that are not used for breeding purposed are castrated, neutered, so that they can no longer impregnate a female.
For cats especially, this is crucial, since there are hundreds of kittens every year that go without homes.
If your cat needs surgery, for whatever reason, there are multiple steps you can take to help your cat with this process. There are three main classifications of surgeries. First, elective surgeries are those that you choose to have done, but that do not have to be done.