" Jill... had explained homosexuality, after Mike had read about it and failed to grok--and had given him rules for avoiding passes; she knew that Mike, pretty as he was, would attract such. He had followed her advice and had made his face more masculine, instead of the androgynous beauty he had had. But Jill was not sure that Mike would refuse a pass, say, from Duke--fortunately Mike's male water brothers were decidedly masculine, just as his others were very female women. Jill suspected that Mike would grok a 'wrongness' in the poor in-betweeners anyhow--they would never be offered water. "

― Robert A. Heinlein , Stranger in a Strange Land