"You want a yes-or-no answer, but the answer depends on the circumstances. And that's the case with every moral decision - decisions need to be made within context. A person has to weigh all the circumstances, and then make a decision. "

The whole premise of this is false. Wearing a condom is a matter of practicality, not morality. It's a matter of knowing what you're doing, knowing how to do it and knowing why you're doing it. Not giving your partner a disease or getting them pregnant at the wrong time are the moral issues and condoms are just one of several ways of expediting their accomplishment. You know and I know that there is absolutely no problem with condoms. If there is a moral issue, it's the Church failing to make that crystal clear in simple words to everyone. Why, that might even save lives. Now that would be moral. In wishing to acquire another instrument of control, the Church has turned artificial means of birth control into a moral issue, one that elderly celibate men can use to increase the average Catholic guilt quotient that bit more. The fact that the average Catholic bloke in bed with the missus neither knows nor cares, as you say, has everything to do with impatience with antediluvian notions and nothing to do with clear and enlightened statements from the Vatican (there never are any, just coded obscurantist waffle to pick the bones out of if you're intelligent enough).