Sweet Tooth?

I think I have created a monster.
I will admit that I did not follow the "What to Eat when you're Expecting" guidelines (oh yes, there is a book by that name) while I was pregnant. It is no secret I enjoy some chocolate now and then. And when I say some, I mean a lot. And when I say now and then, I mean daily, and actually hourly. And so while I was pregnant with Eli I didn't worry too much about it because I ate healthy otherwise, gained the right amount of weight, didn't drink any caffeine, and already had one child who was formed in the same womb and now will eat pretty much anything that is in front of her.
And now we have Eli.
A boy who won't eat anything except for rice cereal and banana flavored Gerber puffs. Not any other flavor, not any other brand of puffs, and not a regular banana in any other form - even if it's mixed in with his daily dose of rice cereal. And if you think something is wrong with me and you could get him to eat something else, please come over and try.
So today, I was carrying Eli and getting a cookie for Myka (because she had finished all of her lunch, of course) and he grabbed at it and broke a piece off. Normally, I would take this away immediately, but I wasn't worried about him actually putting it in his mouth. I haven't even moved the dog dishes off the floor yet because he crawls over to them, realizes they are meant to be food, and crawls away. I'm not even kidding. He just doesn't put food up to his mouth. Except for this cookie. It went right in. I just stood there and watched. He did spit it back out, but then found the piece on his shirt and RETURNED IT TO HIS MOUTH! That never happens. He then lunged toward the rest of the cookie I was still holding in my other hand, and started trembling, like if he didn't have more of that he might go into some sort of fit. He did get one more bite before the "no fake sugar until age 2" side of me took over and I gave the cookie to it's rightful owner.
I'm still trying to figure out how he knew that cookie would be good, and why he wanted it in his mouth so bad in the first place. I had even tried a new Gerber baby snack about 5 minutes before this that he wanted absolutely nothing to do with. In fact, I have tried about everything a baby is allowed to or is supposed to be eating (according to all of the books about feeding babies after they are out of the womb.)
I guess I will just have to write my own book.