ItВґs not that commom. If you wash yourself every day or at least every other day you shouldnВґt have to worry about it. Just use some warm water and your hands, no soap please, it can mess up the pH of your genitals. ItВґs also advisable to wear cotton underwear as much as you can so air can go through (nothing against occasional different underwear ; ). If you wear exclusively tight and plasticy underwear the area not as ventilated and bacteria can grow easier.