Nov 14, - They then create an anus with normal positioning. A pull-through operation is when your baby's surgeon pulls the rectum down and connects it to the new anus. To prevent the anus from narrowing, it may be necessary to stretch the anus periodically. This is called anal dilation. Oct 2, - Don't have anal sex if your anus isn't clean and your bowels are still full. "Right before you have anal sex, make sure you empty your bowels.