I was shaving this morning and --- the razor seemed blunt. When I thought back, I realised that I had only put a new one in only three days ago. And I only have a relatively light growth - shave once a day. And then I back-tracked some more and it seemed that I was replacing blades on pretty much a 3 or 4 day cycle. The razor I use is a Gilette SensorExcel, two-blade. Some time ago I had been trying to screw some more life out of my razors and ended up putting them in an ultra-sonic bath to really shake off all of the gunk that seems to accumulate. Sort of worked, but then I thought life was too short to have anxieties about razor blades and moved on. So. So how often does everone else have to change blades, and does the manufacturer make any difference? And if you were up for a subsidiary question (mostly for the males, I suppose), would you rather have to shave at least once every day, or swap places with a woman and have a period only once a month?