Does anyone else eat the crappy part of the cake out first, then eat the pile of icing left around the outside afterwards?

Yeah, I sort of do that.

OCDs don't necessarily have to be twisted. One more I can mention is I MUST put on lip balm before going to bed. If I don't have any lip balm available, I will find a substitute like lotion or a dab of oil. It bothers me THAT much to go to bed with dry lips.

when i've got a big craving for sugar and don't want to gain a lot of weight, i eat many dozens of donut holes and then lie down on the bed to let it pass easier.

is that normal or twisted?
my mummy says no.

Whenever I order mussels at a restaurant, I will always nest the shells inside one another as I eat. When I'm done, there will be a long chain of nested mussels looking something like this:

"Nested Mussels" would be a good name for a band.

So would "Mary's Last Bite".

Of course. Millions of people do. They're called "children."

Brought back great memories. As a child, I would eat all the cake, leaving a monstrous mound of chocolate frosting for the last bite. Just before stuffing that last bite into my mouth, my father would point at something out the window and I would turn to see what interested him. I would turn back to find my mound of yummy sugar missing and my father with a full mouth and delighted grin. Naturally, I assumed the worst.

Fortunately, my father was NOT an ogre. After allowing me to suffer for an appropriate length of time, he would produce the missing frosting which had been neatly hidden beneath a napkin while I agonized and raged. For some reason he thought this hysterically humorous. I had other opinions.

While I no longer indulge in the practice of saving all the frosting for the last bite, I do enjoy those bites where I can maneuver my fork to get more frosting than cake in any given bite.

We once got my mother-in-law a "cake" made entirely of frosting. True story.

And next you're gonna tell us that you can make a souffle entirely of beer.