I had a similiar conversation with "a friend" recently. She asked me what my fanatasies were. I told her I didn't really have any other than the typical male fantasy of two woman at once.
The conversation progressed, and she told me she wouldn't mind doing that - I asked her if she had something similiar involving two males, but she stated no, she thought she would prefer another woman, as long as she got to pick.
I was ok with that, because her standards are a lot higher than mine.