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Maybe, but many use it quite often. something like this:
http://straightrazorpalace.com/srpwiki/images/1/16/Help_Files_Permanent_Archive_Shaving_Cutting_angle.jpg

hmm, wish that image was...

the old shaving instructions that came with razors often suggested this and described this motion as leading with either the toe or the heel of the razor

I think it's best to start the razor completely flat against the skin when trying to find what angle works. So as you experiment, you just keep moving the angle higher until it stops improving. ...