If your breath smells like something died or your teeth look like they have not seen a toothbrush in years I and other ladies will casually not let you go down. Why you ask? Because we don’t want BV and yeast infections which is what happens from bacteria in your mouth. So if my service says you will get face sitting or Daty and you did not perhaps a trip to the dentist should be something you should do before your next appointment with a lady.  
 
There I said it!  
Sorry I love guys going down on me and I’ll sit on your face till you are blue but when I have to miss work for a week or more because you can’t seem to take care of oral hygiene it’s just not something I am willing to compromise anymore.