If SEX is solely for reproduction and never for pleasure, and
since you invoked the name of God, why didn't God then make sex
displeasurable?
Man and woman get married. Man and woman have "no pleasure sex."
They do it anyway because they want to have children. Once the
woman conceive, no more sex because it is not pleasurable. The man
and woman are no longer interested to have sex because they no
longer intend to have anymore children.
So why did God make sex pleasurable?
As for the other issue, should people have sex solely for pleasure
with no intention of procreation; that is their choice isn't it? We
cannot condemn them can we? They make their choice. We make our
choice.