I've worn a full beard since 1969. I have only shaved once since then, about eight years ago, so my wife could see my face without it. She said: "grow it back!" -- I did. I have worn kilts for about ten years, also with the approval and encouragement of my wife. I've never really thought or worried about my "masculinity" (whatever that is) irrespective of beards or kilts. I have found that wearing a beard or a kilt -- or presenting any other "out of the statistically common appearance" for one's time and culture does tend to attract attention and challenge one's sense of self-consciousness which once overcome, makes one more confident and self-possessed. All clothing and grooming is costume; it's just a matter of context.