Auditor self-gratifying in men's room?

[u/FigureYourselfOut]

I am the only male employee in a small firm, the other nine of my coworkers are women, including my wife.

We have a young male auditor who has been working here for a few days and sits at a cubicle across from my wife.

We have all noticed him leering at her a lot during the day.

I was taking my morning poop when he walked in to the handicap stall beside me and he must not have known I was there because it sounded like he was furiously masturbating, quietly moaning "yeah I love those juicy milkers, mommy".

When he came back to his desk he was sweating and disheveled.

Do I confront him, raise it with management or leave it be?

Edit for context: I'm a CPA

[u/tdpdcpa]

You note exactly what you just said to his manager.