A question for Christians mainly, but open to anyone.
The sole purpose of marriage as a sacrement of Christianity is to provide a foundation to procreate and raise new generations.
Firstly, why do we need to do this. Well, it's naturally survival of the fittest. But then, shouldn't a Christian promote the survival of others rather than him or herself, thus putting everything before the passing on of their own genes?
Secondly, why do we not employ a systematic approach to marriage, like Muslims do, to ensure that procreation is achieved? Why is it acceptable for Christian marriage to based more on whether you personally find your partner attractive and/or with a nice personality, when this surely stems from one's own lust or greed to have someone who likes them back? A Christian should surely strive to be confident and outward in all aspects and not need the return of their love.
Yet then, if we follow Jesus in fully devoting ourselves to others (both human and non-human) and do not form sexual relationships, then the human race would die out. If, as it says in the Bible, the Lion will lie with the Hare, then surely those animals will also die out. In fact, there will not be life as we know it, so what was the point in the first place? And how did life manage to form from a spiritually pure universe if it required a certain level of selfishness in order to survive?