@pleonasm - I don't know, I think there is a line between being awkward and being deliberate with your over-sharing. If someone blurts out something that they plainly don't feel embarrassed about, but which makes me uncomfortable, I'll just tell them I'd prefer not to talk about it. If they are just awkward, they will appreciate the heads-up and stop.
If they think they are entitled to talk about whatever the thing is that is making me uncomfortable, well that is fairly deliberate. At that point you've got to ask yourself if a relationship is worth it. And it's hard to know who is in the right, it's just something you've got to decide for yourself, what you're willing to put up with.