As you cut deeper into the skin, reveal the underlying muscle layer. Using your free hand, stretch and pull on the exposed muscles to widen the incision. Once you have created a sufficiently large opening, insert one finger inside the hole. Feel for any resistance or abnormalities in texture.

Now, slowly insert another finger into the hole. With your other hand, massage the boy's prostate gland through his abdomen to stimulate him and cause him discomfort. As you continue to stretch and manipulate the opening, insert a third finger for further penetration.