If this writer were to ask you about the most popular global personality in present times, you might suggest names such as Beyoncé, Kim Kardashian, Justin Bieber or Dwayne Johnson. But none of them stand a chance in comparison to cats. With a meow here and a purr there — and the advent of cute cat videos on the Internet — they have outdone us as a species. Quite naturally, children like playing with them. Toddlers and preschoolers find companions in the feline creatures as they teach them compassion, responsibility and self-esteem. But is a human family enough for a cat? How do we know if a cat is looking for a friend?