It may be cute at first, but it can develop into a pretty nasty habit. Neutering males and spaying females can dramatically reduce aggressive behavior. In the meantime, try the suggestions listed below to protect you and your loved ones. When I put my hand down for my new rabbit, Jaws, to sniff she lunges at it. It ain't the smell, it's the motion.
Rabbits have great long- distance eyesight.
Their near-distance vision isn't so great. A human hand in front a rabbit's face can be very startling. To break Jaws of her lunging habit, keep your hands above her head and away from her nose. When she looks aggravated, press her head very gently to the floor. She'll interpret this as your being the dominant bunny.