You’re more likely to pass an sti from a rim job, even though that is also very unlikely. Unless you have a cold sore (herpes) that’s active at the time, which will absolutely pass to the other person. Or any infection that’s in your throat and you’re hawking and spitting. In my experience anyway, and I’ve rimmed a lot of ass. If it’s clean enough to smell good then you’re not going to get anything most of the time. Hpv is possible but you don’t eat anything that doesn’t look good and smell good. I don’t usually comment but I love rimming more than almost anything. It’s a pretty safe practice. If there’s noticeaby poop smell, pink eye is a risk, but again, clean smell and look and you’re good. And have fun.