The sound of a cat purring has always been one of my most favorite sounds ever. There have been many times where I just snuggled with my cats over the years and listened to them purr. I believe that purring is a result of happiness. Some people also think that purring happens with nervousness, but I’ve never had a cat that did that. I’ve always wondered how purring happens. I know many people, including myself, consider it a vibration. But noone really knows exactly how it happens. I’ve had cats that purr when interacting with people, and others that seemed to purr all of the time. Does your cat purr a lot?