WRONG! Your body deposits maximum fat on the belly and that is why it`s so hard to burn the fat from your abs quickly and easy (doing crunches for that muscle group). Further more, the muscles from your abs are a very small muscle group.
It`s more appropriate to practice jogging, swimming or cycling besides crunches to have stone hard and hot abs.
Up, down, up, down ! It`s a pity that doing crunches doesn`t help burning the fat from your abs in order to make them look stone hard ! :D