What is in your butt?

Answer 1

Just before a person has to have a bowel movement, feces (stool) moves down into the rectum. As it pushes on the sphinter, we recognize we 'need to go'. After a bowel movement, the rectum is mostly empty, though feces coats the walls of the rectum, kind of like a watery-oil sheen. The tissues may be pinker because more blood enters the tissues while pushing the bowel movement out. Otherwise, nothing is in the rectum. The walls close in more together, so it's an empty collapsed tube.