Despite what we knitters know to be true, the non-knitting world somehow persists in thinking that a "knitter" looks a certain way. Most likely, this picture is one of an elderly woman, grandmotherly and polite, sitting in her rocking chair surrounded by homemade cookies and accompanied by a certain number of cats.
In reality, a knitter today is just as likely to be young, hip, male, and sitting at a "Stitch and Bitch" in a local bar. Several of today's best knitting designers are men, and a knitter is as likely to have body piercings as homemade cookies.
Despite our diversity, the tendency to be accompanied by a cat is an oddity among knitters that cannot be explained.