Giant: Gain the Power of the Female Giant at the Beginning

What does it mean that because I'm a man, I can't use the power of a giantess? What does it mean that the nine giants merge into one, so my head is pointed? So let me ask you, am I a man? If I'm a man, why can I gain the power of a giantess? Then let me ask you, does a woman have to be a female to use the power of a giantess? How can you assume my gender? Then I ask you, then I ask you!