Or it could be from the gallons of insulin and GH that he runs daily!!
"growth of the inner organs"
"1000grams of carbs"
kinda my point

though i dont think anyone is completely flat anyway when relaxed. for a guy dennis' size and especially in the rear double bicep pose, its not too bad. genetically, hip to hip, the actual pelvis bone on dennis, is pretty narrow.
in the mornings when he wakes up, he's flat as a pancake. on the end of a zero carb day too, everything looks normal.
In saying that, the waist has grown fractionally every year since entering the scene in 2006. it was the size of a 12 year old girl back then!