First thing I thought of, too. Except then I thought about some of the rice that I once had at a Hmong festival. Sticky as oatmeal is, it doesn't hold a candle to that rice.
My mother always told me to eat my oatmeal as it would "stick to my ribs".
I of course had a mental image of my chest cavity clogged with a sticky gooey web of oatmeal and refused to eat it.
To this day I can eat just about anything except oatmeal.