Yes, people will break at any time, I was just wondering why at that certain point, why THAT day. My brain works that way, but there could also be no reason, just one day Dean wakes up on the rack and he's done. He's had it.

As for non con, someone (mellow tears) was talking about the sexuality in that little scene. I buy non con as a regular part of the torture, personally.

I don't think I've read any fics where Dean is broken...but are writers afraid of showing Dean broken, or is it just that they never considered that he COULD break? Me, I think it's the latter, because he seems such a strong character. But, yeah, it wouldn't make him any less the hero if he broke. If they did it right.