You can go back to read about the anatomy and the function of globlet cells. So I am telling you our rectum does produce a lubricative film along the anal wall in order to move feces through the rectum. One of the thing I remember very well is a large number of cells called Goblet Cells that line the surface of the first layer (mucosa) of intestine and there are really a lot of them. I recall my memory from pre-clinical year in med school when we studied gastrointestinal tract anatomy and its function. Ever since I learned fisting we learned to use a lot of lube, but sometimes some active fister or even some tops we know that every bottoms self-lubricated and after penetrating them for a while, the ass normally produce ASS JUICE.Īctually it's true.