This reminded me that I was going to point something out to all the men folk.
It might be obvious, I don't know (it's obvious to me, but it's my body), but don't do any back and forth from the pussy to the ass and back. I don't care if it's with a dildo, or a dick, or fingers, or a mouth, or whatever. Unless you've thoroughly cleaned up in between messing with each spot, that's just asking for an infection, especially if the chick is like me and gets UTI's super easily.
Indeed! And that also applies to ass to mouth as well if you're doing more than just licking outside.