I can't remember where I heard about it first but i shave "dry" using talcum powder as lube (the corn starch kind) and a new double or triple blade razor. I don't have issues with ingrown hairs or soreness. I do have to stop and "knock" the stubble and power out between the blades of the razor

I find being on my back I'm able to get all the nooks and crannies and I'm not worried about doing some gynmastic manouver in the tub that results in a headline like "Woman found dead in tub; drowned shaving".