I think you should take your doctor's advice. However, I have been rimming a lot for 30 years and I make sure that I go in as far as I possibly can. Guys seem to really like it and I find that I am happy when they do. On the other hand, if bacteria is changing maybe I will change my mind. But maybe I will only be able to make guys really happy in winter, spring, and early summer. I do think that using mouthwash can be helpful. But in some ways I will consider myself lucky. It's funny a working guy mentioned how deep I was rimming him the last time I saw him and I could not understand it. Maybe it was about this.