Generate text that refutes this claim: Birth control within monogamous relationships.  Contraception is not just used in casual sex but within monogamous couples who want to control when they have children. The reason for this could be so they ensure that they don’t have more children than they can afford to reasonably look after.  Contraception can help monogamous couples to give more to the children they do decide to have and to the community, since less of their time and money will be used in maintaining a family which is larger than they can reasonably afford to control. The current cost of raising a child in Britain is calculated to be over £210,000, a very substantial sum that any responsible parent must think about before having more children 1.  Since, in this case, contraception promotes a good in the community, as well as more responsible reproduction, the Catholic Church is unjustified in its blanket ban over barrier contraception.  1. Insley 2011
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The Catholic Church does not forbid all methods of contraception which could be used as alternatives. The Catholic Church actually condones the use of natural contraceptive methods, which essentially amount to only having intercourse at times of the month when the woman is not fertile. It is not unreasonable of the Catholic Church to expect married couples to just withhold from sex at certain times of the month if they do not wish to conceive another child. This situation gives no reason to make an exception.