Why does my cat sometimes bite me for no reason? Some cats may gently nibble or bite their owners as a sign of affection. It is thought to be reminiscent of how a mother cat Why does my cat lightly bite me for no reason? Love Bites: Much like kneading, love bites are a sign of affection. This is usually shown through cats grabbing you with their paws and lightly nibbling you with their teeth. Cat's may also give you love bites to communicate that they want something, generally food or attention.