I think what you are saying is possible, but I also think it is connected with your brain. I believe in a range of sexuality, with complete heterosexuality at one end, and complete homosexuality at the other. So if a person is a type of lesbian who can physically have sex with a man, but not enjoy it so much, she's more bisexual with strong female tendencies to me. In that respect, since she prefers females, she is probably not going to have a happy vagina after the sex because it wasn't exactly what she prefers (especially the lady that posted earlier.. besides, being a sexual worker, I don't think your vagina would be happy anyway).
Personally, I am bi with strong male tendencies. I could fall in love and be with a woman, but not just any woman type thing if I were to truly be able to respond to her.

Right. I rambled about my theories and I don't know if I made sense.