Women practicing Bisexual relationships are essentially women who are either:
1) Truly homosexual --rare, but possible esp. butch types.
2) Sexually Perverse. These women are truly unstable. They'll fuck men, because it has some pleasure value, and women, because it lasts longer and other women understand the nuances of the vagina. Instead of having the traditional (and short lived)love-for-proprietor (love to see pleasure in him) plus penetration from men. They get assembly line efficient stimulation from a woman expecting the same. These are sorely fucked up humans. Perhaps not as fucked up as pedophile males, but close.
3) Disgruntled with men and perverse sexually. These women love sex, but not the dive right in and pound away that men prefer. That type they cannot tolerate, not even once, and thus turn to women to satisfy their need for attention and pleasure.

You'll find a lot of strippers practice bi. Men do not repulse them irrevocably (as is the case with straight up lesbians), so they have no problem taking their money and playing with their pathetic minds. But essentially they view men as rather mangry mongrels that pay the bills....