There are a lot of scientists or other people who can be very skeptical or rational within their field, but they may well not do that in other aspects of their lives, when it comes to things like religion, or what have you. People have this amazing gift for being selective with their curiosity and skepticism.
I pretty much learned not to fight with it a long time ago and let it do what it likes to do. Otherwise, my shaving techniques are pretty mundane. I tend to do it in the shower because it makes the bristles soft and keeps the razor from building up the hairs inside it, and the mustache is dealt with with scissors.