Yesterday, I had two guys come in for haircuts. Both had large, bushy beards but wanted short, neat haircuts. Neither would let me trim his beard at all. I've noticed this "face mullet" look on more and more guys lately and I think it simply does not work. My rule of thumb is this: the length of your beard should be as short or shorter than the length of the hair on the sides of your head -- unless you're participating in a fundraising event such as Movember. That's the only exception to that rule, in my opinion. What do you think?