You know, thinking more about it, maybe it's not so cute.

I mean, think about it. My cat, as sweet as she is, is only a hair's breadth away from wanting to eat me as a meal. The only thing stopping her is the fact that I'm still alive and that I'm bigger than she is. She tastes me all the time, nibbling on my fingertips and chomping down with exactly enough force to almost but not quite break the skin. When she does this, she makes the exact same noises she makes when she wolfs down cat food.

I think that "cute" cat may simply checking to see if her owner is dead or not, so she can decide whether to begin feasting.