I got shit on his dick

My boyfriend and I tried anal for the first time and it was fine it didn’t hurt too bad but half way through he stopped because he literally had my shit on his dick. You can imagine my embarrassment. He was completely chill about it and didn’t care at all he knew it was natural and normal etc but I decided I’m never doing that again cause I was scarred for life, having my own crap on his dick. However we both really liked doing it and how it felt minus the crap but any advice? Are female anal douches even a real thing?