Conduct prohibited by this policy does not include simple teasing, off-hand comments, or isolated incidents that are not extremely serious. Rather, conduct that rises to the level of harassment must be so offensive as to alter the conditions of employment or the educational environment. If the harassment culminates in a tangible employment or education action or is sufficiently severe or pervasive so that a hostile work or education environment is created, then the conduct is prohibited. … Conduct that may create a hostile environment includes offensive statements and comments, unwelcome touching, and displays of offensive pictures or other materials. Unwelcome sexual advances, requests for sexual favors, or other unwanted verbal or physical conduct of a sexual nature may constitute sexual misconduct.