Quote Originally Posted by JimmyHAD View Post
I would say 'maybe' depending on the razor, and on the hand of the user. I frequently do one pass and call it good. Could it be better ? Well, yes no doubt. The thing is I don't try to get bbs with the one pass, just acceptable. If I were to try I'd run the definite risk of irritation I think. YMMV.

The Multiple Pass Shaving Technique - Straight Razor Place Library
+1 to that. It might cut all the hairs, they won't be BBS though. If you were in a rush a one pass can do the trick. The other two passes in my opinion are just to cut the hair shorter and make the face smoother.