It has been my experience that women prefer me to have a clean shaven face when performing cunnilingus. If for some reason I look like George Michael and haven't shaved in four days, they have been very hesitant about me doing that. With the good ones, they will let me persuade them and in turn they have amazing oral sex. It seems that many women have stupid, inconsiderate, selfish men that haven't shaved and cause them a lot of discomfort.
But - when with facial hair, and a guy who knows how to use it, cunni. is amazing for the woman. I love it when I convince a woman who was scared of my whiskers to try it and then have her cum like crazy.