I think it would have to do with interesting textures and perhaps aromas.

It needs more thought.

It's not what I would want to try but I think she's fishing for something.  If you've tried everything else?? bondage??
I'd turn the question to her.  What is she interested in.
skb

I had a mistress when I was younger.  We were both into BDSM and wanted to cross off all the to-do or at least try list of that genre of psycho-sexual behavior.  We were true experience junkies, and your interests may vary.  Ask your mistress if she would like to experiment with coprophilia and urolagnia as the recipient of each.  I am left with nothing left to try, but at least I won't die with regrets of never having done so.

Maybe you guys should have sex in public places.

Turn the question around, and ask her what she might have in mind. She may come up with some things you didn't even know interested you.

With more trust, there are m ore opportunities to make the relationship more intense.

Whether that's exploring the pain/pleasure thing, emotional closeness, fantasies, 'dangerous' places to have sex, substances that enhance the experience, etc.

If she asked me, I have some ideas but I like a give and take, not just a take, so I'd want to hear her ideas as well.

Re: Exploring Alternatives

Well, that opens up a whole new avenue of fun when I hear those magical words! Hershey Highway, here I come!

How about public sex in or near famous places....
tried it in Europe in Florence under the replica of the statue David, Rome at the ruins , Paris in the bushes under the Eiffel Tower, hj  on a gondola in Venice,canal street in Amsterdam......
better than the sky high club got any ideas at your city