The female Graniliths, more than anything, look for strength and power.
Only the strongest matters. And only the strongest gets to spread his seed.
Stemming from this instinct to only copulate and breed with the strongest, a series of instinctive behaviors have risen.
For one, the female Graniliths enjoy seeing the male Graniliths fight.
Not only that, but what they enjoy more is seeing the sparks birthed from the fighting.
Because of their jagged and rocky skin, fights between Graniliths will often lead to such sparks appearing as they come into contact with one another's bodies.
The sparks that appeared every time that the Paru hit the Alpha were no different.
The female Graniliths found the appearance and the making of those incredibly arousing, and the victor is the one whom that arousal would fall on to satisfy.
There were twelve female Graniliths.