I just edited to add a bit more to answer your question:
**We know that the stomach has TWO PURPOSES: nourishment, AND pleasure. And that EVEN WHEN WE’RE NOURISHED - it’s okay to put more into it (wine or dessert after a meal) to give us pleasure.
We believe that’s okay. **
(The direct statement then is: if that business with the stomach is true, why can we not use our sexual organs with our spouses for pleasure when the miracle of procreation is fulfilled and satiated within our marriage?
How is it impossible that the church is wrong?