I’ve heard a lot of people that do anal coordinate their bowel movements with sex and do things like avoid eating at certain times.
I think it’s mostly unnecessary. If someone is sticking it in that hole, they know what they’re getting in to and they’re not going to be unduly disturbed if they hit feces. You can feel it very clearly with your penis when you’ve hit feces, and they probably won’t even tell you if they are. No matter what you do, they’re going to eventually hit feces. Just wear a condom, you should be anyway and it’s the only reliable way to avoid poop noodles.
Enemas significantly increase the infectivity of STIs, which someone may not know they’re carrying.
Regardless of the kind of sex you have, don’t ever rub your eye. Herpes eye is a serious complication. Feces in the eye gives you pink eye. And clean everything.
If you’re into weird stuff, it’s worth while to buy a house with a big shower room. You can put sex furniture in the shower and hose it all off afterwards with a miracle grow “garden feeder” attachment with clothes detergent.
At very minimum, put a towel underneath.
Starting: 7"bplx5.2" 2017 (shrunk from disuse)(originally 8"bplx4.5", gained to 9"bplx6")
Current: 9.0"bplx6.125" 2020
Goal: 11.5"bplx7" 2021.