First off, this is something that you should not have to put up with at work. Second, this certainly sounds like unlawful sexual harassment although these things are complex. Third, there is a “defense” to sexual harassment claims that employer’s can raise as a defense to supervisor sexual harassment. In very simplified form, the defense can be used if the employee failed to complain in the correct manner for example via the employer’s sexual harassment reporting procedure if there is one. But, as with most things, it is not always that simple. Therefore it is imperative that you seek out a consultation with an experienced employment attorney to help you work out a plan of action as quickly as possible to make this stop, to protect yourself from retaliation (as best you can) and to stop the employer from raising the affirmative defense (what a layperson might call a technicality).
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I hope this helps.