Here's something to try, should you be so inclined. Approach this from the angle of expressing concern.
A couple of years ago, I worked at a fairly conservative company. Over 100 years old, just barely into the computer age in 2010! Jeans only on Fridays. However, there was an admin there who had several piercings, including one in her tongue.She also had visible tattoos. She was mid 20s, hard-working, enthusiastic and very pretty.
Her grooming was at odds with what you'd expect for the company but she was anything but slutty.
She started making strides in her work and wanted to move into sales. Also interesting because the customer base was also rather conservative and now she'd be "out there". But she was good, bright...and did I say pretty?
Anyway, everything was cool 'til she went to a regional sales meeting out of state. Most of the salesmen were --you guessed it-- men, and when they all returned, one of the female managers confided in me that some of the men had been making lewd statements about the admin, wondering what she could do with that bar in her tongue and so on.
The manager didn't want to say anything one way or the other (but she could gossip to me
). The admin was young enough to be my daughter and I hated to think of her beginning this new direction in her career with that nonsense. So, I spoke to an HR person...not complaining but letting it be known what was being said and how maybe the admin could be kindly taken aside and advised. The HR person thanked me, she did have a chat with the young lady and adjustments were made with little embarrassment.
In your case, it sounds obvious the women know what they're doing. That's too bad. But by playing the "concerned big brother", you may help correct the situation, deflect any negative attention you might get, and you've also mentally reinforced your own resolve to think chaste thoughts.