Note: The Feldenkrais Guild has allegations against trainers going back more than 30 years and has shown little progress in combating the problem. It may be best to either go public with your accusations or go directly to an attorney and then file a lawsuit or go to the police.
A long and detailed article from RAINN (Rape, Abuse & Incest National Network)
You should be able to feel comfortable in your place of work or learning. If you are being sexually harassed, you can report it to the authorities at your job or school.
What is sexual harassment?
Sexual harassment includes unwelcome sexual advances, requests for sexual favors, and other verbal or physical harassment of a sexual nature in the workplace or learning environment, according to the Equal Employment Opportunity Commission (EEOC). Sexual harassment does not always have to be specifically about sexual behavior or directed at a specific person. For example, negative comments about women as a group may be a form of sexual harassment.
Although sexual harassment laws do not usually cover teasing or offhand comments, these behaviors can also be upsetting and have a negative emotional effect.
More can be found on the RAINN website: https://www.rainn.org/articles/sexual-harassment