Why Do Some Cats Nibble On Your Fingers. Every cat has their own little personality traits and ways of showing you they love you. Cats nibble when they groom, it's probably a sign of affection.

Your cat may be nibbling on you for a similar reason, out of playfulness, and wanting to have fun and “attack” but not in any sort of way that’s harmful to you, just in a way that’s engaging and stimulating for him or her. Though if you have milk on your fingers from time to time, its likely they have associated your fingers with yummy treats and that's why they continue to do it. When our domestic cats are playing, they’re often honing the hunting skills.