My friend Madam C has introduced me to her 'Mistress therapy' of letting fly at full strength with a crop or a cane in close proximity to a vulnerable set of cock and balls. For safety's I normally hold back when beating these tender areas of my slaves, but once in a while it is fun to let oneself go. The idea, of course, is to get REALLY close.. but not actually hit with the powerful strokes; but "Oh Dear"... accidents will happen.