I say, and with God's help: The consideration of things that break the fast is based on the entry of something through a recognized opening, and the anal opening is a recognized opening. An enema is the insertion of medicine into the anal opening, which breaks the fast. As for the case of cleaning oneself after using the toilet, if a person exaggerates in this by inserting a finger into the anal opening, they break their fast; otherwise, they do not break their fast. And God knows best.