>>13570950>Mark 10 6But from the beginning of the creation God made them male and female. 7For this cause shall a man leave his father and mother, and cleave to his wife; 8And they twain shall be one flesh: so then they are no more twain, but one flesh. 9What therefore God hath joined together, let not man put asunder.Sex is strictly for marriage, and marriage is for a biological male and female. Spilling seed isn't a sin and I'm going to spill my seed all over my Godly wife whenever God guides me to her.
As for the tree of knowledge the sin was Eve trusting the Serpent over God, violating the first commandment. Had Eve simply gone to God and asked He'd have said yes and also given her the fruit of life.