I wonder why the practising Catholics haven't yet weighed in?
puddingmouse wrote:
Theologically, it has something to do with something called Natural Law....
http://www.catholic.com/tracts/birth-controlQuote:
Contraception is wrong because it’s a deliberate violation of the design God built into the human race, often referred to as "natural law." The natural law purpose of sex is procreation. The pleasure that sexual intercourse provides is an additional blessing from God, intended to offer the possibility of new life while strengthening the bond of intimacy, respect, and love between husband and wife. The loving environment this bond creates is the perfect setting for nurturing children.
But sexual pleasure within marriage becomes unnatural, and even harmful to the spouses, when it is used in a way that deliberately excludes the basic purpose of sex, which is procreation. God’s gift of the sex act, along with its pleasure and intimacy, must not be abused by deliberately frustrating its natural end—procreation.
I don't quite follow the "natural law" argument. Why would a "deliberate violation of the design God built into the human race" necessarily be wrong? Hair-colouring and make-up would also represent "deliberate violations of the design God built into the Human race", but Catholics do use cosmetic products. We spay and neuter our pets, which violates natural law. The Catholic Church doesn't make a stink about that.
I also don't see where sexual pleasure becomes necessarily "unnatural" or "harmful" when procreation is avoided.