I know the first line is a joke

At least I hope it is! LOL.
Lasciviousness is about men having self-control. Just because something might sexually arouse someone (manner of dress, action, etc.) doesn't mean it has to happen. It also doesn't mean that you can control someone's manner of dress or behavior because it MIGHT cause sexual arousal in someone else. It's ridiculous IMO that women should have to be so aware of how they present themselves, while men seem to be given a free pass.
There's a big difference there. Power differentials, etc. Not only that, but the actor performing the "objectification" is markedly different.
You're also assuming that she is objectifying herself. That in and of itself is an assumption.
Everything is not so cut and dry, there are many social and cultural nuances that DO exist and that many people discount as "PC bull$h1t".
I'm not attacking you, I'm just trying to spread awareness that people have very different opinions about this and other issues. Just because others don''t agree with you doesn't mean they are wrong, it's just that a lack of empathy and understanding from other's perspectives seems to be distinctly lacking in today's society.
And yes, I tend to have a bias against people that hold "old fashioned" beliefs. I do try to consider things from the perspectives of others. It doesn't mean I won't express my opinions in ways that you or others of opposing views don't like.