I always thought it made sense since Ayla was a girl that her enemy would be as well...Seems like a lot of female rulers prior to Guardia...
Well, many of the early cultures were based around female rulers. Females were the life bringers aqnd lived lives of luxury, while males did what human males are kind've made for... specifically, they fought battles, did the hunting, did manual labour, and grunted a lot.
Males were also used as whores for breeding purposes. Which actually seems to fit Kino quite well.