i feel that in Brokeback Mountain the walls are real AND man-made. yes, they are stifled by the code they live by, but their only other choice is death-- where would they go and how would they survive if they stepped outside these walls? at best, they'd never be hired by anyone and at worst they'd both wind up like jake gyllenhaal's character. it's also worth nothing that the values that imprison them are also the values that they'd be embracing if they broke free. heath ledger can't quit his children any more than he can quit jake gyllenhaal.