>>40649 (OP)
just make your bf fast and get him to use a bidet on the highest settings, it'll clean you out really good, if you're sharting clear water then you're clean, you'll know there's nothing left to clean if you can feel the water make it's way past the rectum into the sharp bend and into the large intestines (sigmund colon).
Use soap if you want, but it doesn't really get any cleaner than that.