Some women like to mask their smell with perfume. If her hair and body smell bad then run in the other direction. However if she is new to oral sex then maybe you can guide her by being gentle and showing her the right way to stay clean before sex. My suggestion is to get a hot small towel and wipe in between her thighs gently. Then wipe inside her pussy lips while patting it a little to put her at ease. Some ladies need guidance and not all of them are nasty however no man has ever told them the truth. Be the good guy and warm up that towel then eat her pussy. Pussy Eating