That is disgusting. My family used to make fun of my elementary teacher, Mrs. McCrakken. We'd go to Mcdonald's and say she'd stick the Mcnuggets in her crack.
There are children in Siberia who could really use those chicken fingers. But instead, you deprive the kiddies and let the chicken abrade your anal cavity.
They should be smooth to raspy.
Either way, I can't imagine it's normal.