It should be clear that God gave us sexual desires to assure that procreation will continue. To use any contraceptive solely for the purpose of enjoying sex is to thwart God's purpose and to be purely self-centered. If everyone does this at all times, humans would become extinct in a few generations. You don't have to be a theologian or scholar to see that the teaching of the Church against the use of contraceptives is right; you only need to cast aside selfcenteredness and think with a clear, cool mind. This teaching fits in perfectly with the other teachings on marriage and the sanctity of life.