The interesting thing here, in my opinion, is that "exploring boundaries" typically translates to "exploring the woman's boundaries." Men won't let women penetrate them anally but they desire to penetrate women anally. Men won't striptease for women but they want women to do that for them.

I think that the reason women are reluctant to explore boundaries is because men are not willing to reciprocate. Women tend to know that sex is about them being vulnerable and put in uncomfortable positions while men enjoy the pleasure of seeing them outside of their comfort zones. A little more equality in the bedroom could go a long way.