... and here we have another point that makes perfect logical sense but my findings are different (again). My "prep" consists of splashing some water on my face seconds before I start face lathering. Nothing else, no pre-shave, and definitely no shower before. FWIW, I used to shave completely dry (no water or lather) at least twice a week, usually more, during my younger years (always waking up too late to shave), and still do it on occasion to see if I still can. No irritation whatsoever, and I have a course Mediterranean beard that has gotten wirier when it turned gray.At any rate I think blade longevity has as much if not more to do with good prep than angle or razor choice.