And on the 8th day he created the turkey baster, the petrie dish, the pipette...Genesis 1:27 (NASB)
27 God created man in His own image, in the image of God He created him; male and female He created them.
God's desire? Fellowship.
God, male & female. A reflection of the Trinity. The image of God.
God, male & male? Fail.
God, female & female? Fail.
Only the original design works.
What are you still confused about?
THOSE designs works, too.