It turns them into sex-crazed Lutherans.
Remember boys and girls, sex is only for procreation.
To say sex is only for procreation is way mistaken.
The Catholic Church, the foremost objector to contraception teaches that there is a unitive reason for sex in addition to the procreative.
Look it up and learn.
Sex isn’t only for procreation. It’s still a special for-marrieds-only way to bond with your spouse. Nothing wrong with having intercourse when you’re naturally infertile.
So...straw man is all you got?