Everyone has a right to work in a healthy, safe, respectful and equal environment, and be free of harassment. Employers must prevent or stop harassment in the workplace, and this includes within a co-op environment.
Any unwanted comment or joke, attention, or conduct of a sexual nature in the workplace is considered sexual harassment and is against the law.
There is always more than one option for a bystander. Take a stand and do something you feel comfortable with. You can: