Curious on this one. Not so much for myself as I've never used it by thinking more for my wife. She has shown some interest in DE shaving and now that I have been dabbling with a straight she seemed to be alright with me shaving her legs with a straight. So I was wondering if I used a pre shave oil with her would it really matter what was used? I mean is there any reason why you couldn't use something like baby oil, or even olive oil? I've heard there are people who have used peanut butter as a shave cream so how bad could something like olive oil be?