Kim Elsesser and Letitia Anne Peplau found that the professional workplace environment and heightened sexual harassment awareness can hinder cross-sex friendship formation. The barrier between men and women forming cross-sex friendships in the professional workplace is called the "glass partition" because of its similarities to the glass ceiling, which prevents women from reaching the top levels of leadership of corporations. The glass partition disadvantages women who work in predominantly male workplaces because women have fewer opportunities for networking. The glass partition results from fearing that friendliness toward a cross-sex friend will be misinterpreted by the friend and by co-workers as romantic or sexual interest, that humor may be perceived as sexual harassment by cross-sex friends, and that conversational topics might be perceived as offensive by cross-sex friends.