... to (ahem) have relations with their spouse when there is this?
Yes it really is all that. (Almost) Ahhhhhhh....
Although I must still encourage all good catholic couples (er... make that all good pro-life couples, because we'll need the help of protestants, muslims etc, too) to continue relating with their spouses, and to have as many children as possible, because otherwise we won't be able to take the world back.
Oops did I just reveal our secret conspiracy back there?