Have a look around at nature; clearly there was something wrong in the design plan then.
There was nothing wrong with the plan. Someone, or something, tried to change it. If you read Genes 3:15, it starts to get clear who. The whole book of Genesis was written in Hebrew. In 3:15 there is one word written in Greek. The word seed. It was written in Greek for a reason...to stand out. In Greek the word means; SPERM. God is saying to Satan, "Because of what he did with his sperm." Genesis 5 is the life of Adam. Note: His first child is Seth. Cain is not listed as Adams child.
The Bible was taken from the Scrolls, thus the two should match word for word. They do not. In the Bible when Eve had her first child (Cain), she said, "I have gotten a man from the Lord."
In the Scrolls it reads; "I have gotten a man from the angel of the Lord, Sammual. (old name for Satan.)
The scriptures show the human DNA has been mixed with non-human DNA. It is why we age, and die.
The word sin means, "Falling short of the mark." Means not perfect. Those who are homosexual, have fallen short of the mark by birth. But...we are all short of the mark because we are all sinners.
God said to Cain after he murdered Able: "You are a liar, and a murder like your father the devil." There was no fruit eaten in the garden. The trees there were symbolic, as all the trees in the bible are. Can angels make sperm? Yes. Angels cme to earth, took the daughters of men, and had children.( the giants.)