Relevant excerpt
In 1980, the Equal Employment Opportunity Commission amended its “Guidelines On Discrimination Because of Sex” under Title VII to include sexual harassment, defining the term as follows: “Unwelcome sexual advances, requests for sexual favors, and other verbal or physical conduct of a sexual nature constitute sexual harassment when [...]
3) such conduct has the purpose or effect of substantially interfering with an individual’s work performance or creating an intimidating, hostile, or offensive working environment.”