Interesting. I've tried eating really fatty pieces of meat and it's never gone down. Just the other night we went to some Phillipino restaurant and my friends ordered something that was the pork belly breaded and fried. No can do. I could only eat bacon if the fatty part was cooked enough that it became hard ( which is why I microwave my bacon so it's slightly overcooked and all stiff ).
I can eat something like carnitas but not pieces of fat directly without gagging. Just about the fattiest thing I can eat is probably whole milk ( which I can consume a lot of ) or maybe ice cream. Still not a chunk of fat.
I also seem to notice that ingesting something fatty generally seems to make me want to go have a bowel movement within a short amount of time (15-75m). Weird and possibly TMI but peculiar.