Last month I wrote that conduct that is sexual in nature does not necessarily constitute sexual harassment unless it is directed at a person because of his or her sex. But what about conduct that is not necessarily sexual in nature, but really creepy? In other words, can stalking be considered sexual harassment, even if it is not overtly sexual? If so, can an employer be liable when a customer or some other third party is doing the stalking? In a recent case involving Costco, the Seventh Circuit unequivocally found that it can and was.