—> if we keep that pleasure within marriage.
It’s the best.
—> the biology established by God shows that its purpose is procreation.
You seem to have missed spiritual union between a husband and wife - and God’s encouragement to enjoy sex.
Have you actually read my posts? I have indeed reaffirmed that. All I have stated is that that aspect of the marital act cannot be separated from its primary end of procreation.
That means that before the fall, conception was not likely to be a common event therefore sex was mostly for pleasure.
If sex was for procreation, God could have just caused women to go into heat every couple years. Just take the pleasure out of it all until then then there would be no issue of married couples having sex for the fun of it because they love each other.