Well after 2yrs of smelling like hot feces, I've finally gotten a diagnosis. It's called internal intussusception. Basically I can't go for #2 properly because my rectal walls are blocking the passage. Main symptoms are the lost of urge to defecate, constant incomplete evacuation, chronic constipation/straining, and the worst of all is the "mysterious odor that everybody but me can smell." Others says it smells like a dead body, rotten garbage, dog poo, fart, and (fill in word ____). Will be going for surgery next month and hopefully this nightmare will finally be over. BTW the diagnostic test was called Dynamic MRI of the Pelvic Floor, not many places do them so you have too look round.