The article you posted has a very basic misunderstanding of Catholicism. The following is little more then anti-catholic garbage.
The question of birth control has created much debate in the Western world. This question is related to the basic view of sex. On one hand, if you relate sex to the original sin and equate it with evil, and allow sexual intercourse only for the purpose of procreation then, obviously, you will be totally opposed to birth control. Allowing birth control would mean allowing sex for pleasure. On the other hand, if you consider sex to be a natural act whose purpose is two-fold: procreation and/or fulfillment of sexual desire, then you would allow birth control. The debate on the use of birth control, moreover, is intertwined with the issue of abortion.
Original sin has nothing to do with sex.
Catholics, like Muslims believe that sex is only allowed in marriage. It is allowed for all purposes God intended it for. To bind a couple together in love and to create children. And yes there is please involved in this. If it were a chore there would be little procreation in this world.
No one knows when the soul become part of the human life, so the Catholic Church takes the conservative stance that human life begins at conception. The major reason that birth control, such as pills are not allowed, is because they cause an abortion. They cause the fertilized egg from adhering to the walls of the uterus, ending the pregnancy by a very early abortion.
The site you pointed to seems to ignore Muhammad’s statement about birth control……
It seems from the below Hadith, that Muhammad disapproved of preventing pregnancies. In this Hadith his men are asking about using a form of preventive birth control when the rape the women war captives. Muhammad tells them 'No soul is ordained to be created but Allah will create it." So basically humans are not supposed to try to stop God from creating new souls/humans.
*ONENESS, UNIQUENESS OF ALLAH (TAWHEED)
Volume 9, Book 93, Number 506:
*Narrated Abu Said Al-Khudri:
That during the battle with Bani Al-Mustaliq they (Muslims) captured some females and intended to have sexual relation with them without impregnating them. So they asked the Prophet about coitus interrupt us. The Prophet said, “It is better that you should not do it, for Allah has written whom He is going to create till the Day of Resurrection.” Qaza’a said, “I heard Abu Sa’id saying that the Prophet said, 'No soul is ordained to be created but Allah will create it.”