Does an employee gave to communicate the offense to the supervisor that is doing the harassment?

I'm a male and have a male supervisor. Since December he started talking about sexual stuff and doing things like rubbing my shoulders, poking me in the ribs, touching my face etc. he only does it to me and several people has witnessed it. I'm also not being allowed opportunities that other employers are given. The reason who I never told supervisor to stop is because he has made it clear that he gets what he wants at our place of employment and I've been afraid of retaliation. The touching has gotten worse so I went to HR. The first think HR asked me is what did I do to provoke him???? HR stated they would investigate however it happened again Friday afternoon. I got upset and left early that day. I called in Monday and Tuesday hoping the issue would be resolved however once I came into work today while I was on a call my supervisor started rubbing my shoulders. Once I got off the call I emailed HR to let them know it is still going on and they replied will follow up.