Fruit

They keeping preaching "they will know you by your fruit" and "you must surrender all!"  

I agree.  

I internalize.

My answer to why...

it finally dawned on me!!

Theology begins with the body.    

“The root principle of birth-control is unsound. It is a glorification of the means and a contempt of the end; it says that the pleasure which is a means to the procreation of children is good, but the children themselves are no good. In other words, to be logical, the philosophy of birth-control would commit us to a world in which trees were always blooming but never giving fruit, a world full of sign-posts that were leading nowhere. In this cosmos every tree would be a barren fig tree and for that reason would have upon it the curse of God.” 

-- Archbishop Fulton Sheen