So if a wife has a hysterectomy and cannot conceive she and her husband can no longer have sex because it would be a sin?
Everything else is a sin. Including contraception, oral and masturbation.
Not really.
Homosexuals will NEVER be able to create children, as a result of their mutual sexual activity, even if all their own parts ARE working correctly.
My short post didn’t give an exhaustive list that included exceptions - like beyond child bearing years.