I know many (including some women) feel this way, but in my opinion it is wrongheaded. Women can dress as sexually as they want and still retain the right to not being come on to at work. Especially in a business where your job is to appear in front of the camera, and part of what everybody is selling is your looks.
You being attracted to a woman is not a license to mess with them. We understand this in some way because we revile Islamic culture that makes women dress head to toe in a bag so they don't slyly get our masculine juices flowing. The argument about women losing sympathy in a harassment situation because they are wearing "slutty" clothes is just that kind of thinking with different boundaries.
Even if a woman came to work stark naked you wouldn't have the "right" to pinch her butt.
This is just something that older guys have to get over. The world's changed and that stuff has been thrown on the ash heap of history.
If it harm none, do it.
Protect the weak from the strong.
In the case presented, the second rule is voilated.