This is just, an hypothesis...You know the Abs the 8, 10 and 12 packs...If you develop them from, the time you are skinny, i think they serve as a: extension pressure WATER RETENTION DAM....It holds/retains the belly fat or belly from coming out...Is a hypothesis....Why i say this...Because every person who i have known to have: 8 or 10 packs is NOT FAT, they are still skinny as when they were youth...They conserve their skinniness for a very long time for years....