Elizabeth Anscombe, "Contraception and Chastity"

An untimely meditation by a brilliant mind.  A powerful antidote to the confused suggestions of the age.

Excerpt:

If contraceptive intercourse is permissible, then what objection could there be after all to mutual masturbation, or copulation in vase indebito, sodomy, buggery (I should perhaps remark that I am using a legal term here - not indulging in bad language), when normal copulation is impossible or inadvisable (or in any case, according to taste)? It can't be the mere pattern of bodily behaviour in which the stimulation is procured that makes all the difference! But if such things are all right, it becomes perfectly impossible to see anything wrong with homosexual intercourse, for example. I am not saying: if you think contraception all right you will do these other things; not at all. The habit of respectability persists and old prejudices die hard. But I am saying: you will have no solid reason against these things. You will have no answer to someone who proclaims as many do that they are good too. You cannot point to the known fact that Christianity drew people out of the pagan world, always saying no to these things. Because, if you are defending contraception, you will have rejected Christian tradition.