Sitting on the how to not poop while having anal, use the syringe with warm water and inject the water slowly, then evacuate. Do this a times and everything should be good for a few hours. And if you're comfortable with your body, as you probably are since you seem pretty sexually adventurous, insert your finger to see if you are clean inside. You are wanting to clean out the rectum, not the entire colon with a large volume enema. And remember that if you play with fire you will get burned on occasion.