Yeah, but why is artificial contraception evil? Just because something falls short of its fullness, doesn't mean it's evil. I am obedient but not convinced.
Mrs VS
It's evil because it perverts a gift from God. We are made in His image and likeness, and one of those ways we mirror our Creator is our life giving love. To pervert this love is to make a mockery of the gift.
We are called to love our spouse with fully and completely. You can't love him totally, if you don't have him totally. If you accept him all, expect his fertilty, then you are reject the man created by God, and accepting the man created by yourself. And vice versa. If you don't accept him for who he is, then you are using him.
It's not a matter of falling short of fullness, because it's not about preventing pregnancy in and of itself. We are created to naturally regulate pregnancy. It is the mockery of the fullness of God's love, and the complete love that we are to love with.