Going out on a limb here, but it could be related to some trauma or other unresolved issues she has toward sex.
Maybe... .I don’t know. During the first year we were together, 10 yrs ago, she would confide in me about a lot of the trauma from her childhood. She never spoke about sexual trauma. But about the time I was painted black for good she had made a collage that consisted of nasty letters that her father had written her during her adolescence and college days, as well as pictures and personal writings. She then burned the collage. Before burning it, one day I saw what seemed to be a journal writing that made vague references to being sexually abused. I asked her with genuine concern about what had happened. She never responded. And since then she never has opened up ever again to me.
So I don’t know... .maybe.
she seems to obsess over it publicly, but recoil from it privately. Maybe a cry for attention? Does she act more flirtatious or provocatively around other men and/or women? I'd be concerned by that for other reasons.
Her public demonstrations of this sexual art is definitely new. Only the last 3-4 yrs... .prior she wouldn’t show anyone.
She is not and never has been flirtatious or provocative with others. In fact I grew convinced in the early years that she truly hated men and maybe was not able to be open about her possible attraction to women. In our relationship, I have come to represent everything bad that men have ever done to women. Now, I am convinced that she loves me in her very immature way, or to the best of her ability. I honestly think my wife has been more sexual and intimate with me than any man in the past. Sex and intimacy has always been difficult with her to say the least.
These sexual pieces, mostly paintings, are almost exalting women’s sexuality. Something she severely struggles with.
Maybe that is it, simply externalizing something she would like to be... .I don’t know.