It may be unfair, but we often judge people who are messy. For instance, if you’re interviewing somebody for a job interview, and they have a mustard stain on their shirt and haven’t combed their hair, you’re probably going to think they aren’t the best person for this position. For all you know, a hot dog vendor attacked your candidate just before the interview, and got mustard on his or her outfit, but you’re not likely to consider that, are you? Nope, you’re going to think, “I’m not hiring this joker.”
Unfair, but true – we form opinions when we see an unkempt mess.