Earlier quoted context omitted.
Alas, you don't know what will happen until it does happen. It could be as simple as "Wow, Joe reported Bob for sexual harassment, but Bob didn't do anything wrong - I was there. Now I have to be extra-careful around Joe to avoid getting reported myself!" And there you go - Joe is now suffering from "retaliation" and being treated special for speaking up.
That is already happening in many professional contexts though - and without Joe ever having to speak up about anything. Male professors avoid being alone with female students. Male colleagues refuse to work with or to a lesser extent, refuse to be friendly on any sort of casual level with female colleagues entirely just because of the small risk that an accusation could cost them their job/career. This fear actively…
MILF is borderline a bad way to talk to someone, yet, everyone here is saying: FIRE HIM or FIRE THEM.
It would be harassment if he continued after she said stop, it would be harassment if he groped her, it would be harassment if he talked clearly obscenely about her, MILF is borderline, and yet, everyone is saying, FIRE HIM.
Guys, just give the benefit of the doubt, make it a clear statement that you on the workplace are clearly against any kind of advance that might happen between employees, and that's it.