The Castratrix Handbook says that no wife has ever regretted causing too much pain at her husband's castration, but many regret not causing enough. [no imagefap]
Look at these dirty feet after walking all day… covered in dirt, sweat, and that strong smell. Get on your knees and lick every single speck of grime off my soles. How long would it take you to get rock hard just from smelling them?