My friend and I were talking last night about the worst books we've ever read. She read one years ago that would be categorised as science fiction, I think.
It was set in a utopian lesbian future. All the women who lived in the towns were dominated by the men; and all the women who lived in the countryside were telepathic telekinetic lesbians who could read squirrels' minds. Whenever the men left the towns and ventured into the countryside they became impotent.
And that's about it. Bear in mind that we were moderately pissed when we were having this conversation and this description is based on her drunken recollection of the plot, so it may be incomplete.