Not all peaches have fuzz. Some varieties, such as the donut peach and the nectarine, have smooth skin. Nectarines are actually a genetic mutation of peaches, and they have a smoother skin due to a recessive gene. Fuzzy peaches are the most common type, but smooth-skinned peaches are becoming increasingly popular due to their appeal to consumers who find the fuzz unappealing or unpleasant.