I've see so much of this first-hand that it was a major reason why I left my previous job (I'm male). My manager was constantly touching female coworkers (back rubs, hugs) and he would always bring up his and their sex lives. One time during our standup, he talked about how much alcohol a female coworker drank with him when they were out of town on company business together -- it was pretty clear that he was implying he slept with her. He's also cornered women at an after work social and asked her how she would like to feel his beard between her legs while another team member kept grabbing her waist.

No one will speak up because he's too important and most of the women need the jobs (single mothers or primary bread winners). He gets away with most of this stuff in full view of the company.