Well I guess you were very low in carbs, so when you finally ate some your body went crazy. Makes sense to me. OK, sure you body doesn't 'need' pizza, but it sure as hell wants some. Even if Grok had eaten low carb, which is disputed, he sure as hell would have gorged on a pizza equivalent food if he had come across it - a quick acting energy food (carbs), with a bit of fat and protein mixed in. Even if your brain says no, your body says bring it on.
I'd probably cut yourself a bit of slack and eat some pizza/chocolate and almond paste every now and again.