To dissociate the child from love is, for our species, a methodological error:
-contraception, which is to make love without making a child;
-artificial (in vitro) fertilization, which is to make a child without making love;
-abortion, which is to unmake the child; and
-pornography, which is to unmake love: all these, to varying degrees, are incompatible with natural law.

- Jérôme Lejeune