I must have led a sheltered life, as I didn't know about a lot of this until recently.
I naively have always assumed that when women were cut off from men sexually from widowhood, etc., they didn't seek alternate sexual outlets, other than the self one perhaps.
Most women I have known would have to be in pretty dire straights to even consider such behavior, and I'm talking women who aren't particularly religious.
Many people do things they not talk about. Amazing things you learn from people when they drunk and blabbering inner secrets. Maybe it just my generation? I have heard from several women that they can accept threesome with 2 women and man as a feminen thing that's kinky but out reject opposite, because they want man masculine not some pillow biter.