Should our senses simply be denied their desired objects? No!
Chapter 21 moves from talking about our intellect/understanding and our will to our lower powers (the senses).
Remember the third weapon of the spiritual combat is the right use of our powers of soul.
Chapter 21 tells us that we must turn our bodily pleasures of taste, sight, touch, hearing, and smelling to God. Why? God is the author of every good thing we enjoy. How beautiful and enjoyable must God be if he made this or that enjoyable thing? Where did this singer get his talent? Where did this food get all this taste? Where did this beautiful image get its beauty?