But Christ, even as man, did not have a fallen human nature. Christ is not a human person as all of us are. That would be the heresy of Nestorius. This heresy has deeply penetrated professed Catholic circles. Florida A.No, it is not morally permissible.
Contraception is inherently sinful.
It is sinful by its very nature. Consequently, it cannot be permitted even for a laudable reason, like sparing retarded women from the embarrassment or the problems that would follow on conceiving a child. Proportionalism claims there is nothing which is sinful by itself. It claims that if you have proportionally good reason for doing something, you may do so no matter how evil the action may be in itself.