Looks and personal grooming are the first things we notice when meeting someone for the first time. It's superficial, but unfortunately it is true.
Eventually when we get to know the person we become more tolerant of their personal, physical quirks, but that only happens once you've already hired someone, coupled up with them or ate ice cream on their couch.
Any long term couple will tell you that after cohabiting for a certain time, you find yourself approving questionable things, like “optional showers”, lush, unshaved legs and long toe-nails in bed.