From what an escort told me, she always stick on a particular diet when on tour, to be sure not to have any bad surprises. Then, she also said that in a strange way, she could kind of "feel" if her rectum was clean or not. of course, an enema doesn't hurt
this discussion happened because she ("only in very special occasion") like to do some
ass to mouth from time to time (don't you think it's a great title?)