Eating ass, risks?

My partner and I have been experimenting with ass play, they have been eating my ass occasionally and tonight I ate theirs for the first time, and me being overly paranoid about everything thought to myself after we finished about what could happen to me from eating ass.

I looked it up and read that you can get intestinal infections, parasites and STDs

Me and my partner have been together for a year and we have both been tested but what are my chances of getting a intestinal infection or parasite from this? I read that my chances are small but I’d like more reassurance. We shower regularly most of the time we shower together so I know they are clean.

Could I really get sick from eating their ass once?