While hanging out with my homies downtown at Catholic Charities a while back, I met a homeless man who, while waiting for his turn with us, asked me for a razor. I dug around and found one and brought it out to him. I proceeded to watch him shave dry. No water, no lotion, nothing but zip zap zurp and his two day beard was gone.
Since then, my wife bought me a Gillette 5-blade razor and some shaving cream. The razor does a great job, but within 3 shaves, it's gummed up with shaving cream goo no matter how much you clean it. Recalling my homeless friend, I've taken to shaving dry or slightly wet. The shave is just as close and the razor blades last a lot longer.