Yeah, I'm the same way. When it comes to pastries, moderation is out the window. And it doesn't matter what it is or what size it is, a cake, pie, a bag of cookies, etc, one day is about the limit of its existence.
I shop at a Mexican American Supermarket across the street. As you enter the store the first thing you walk through are pastries, all kinds of homemade pastries. I've never been tempted, but recently I came out of the hospital and I thought I'd treat myself. I bought a little cake-like thing in a plastic container. I didn't expect it to be very good, but it is one of the best things I've ever eaten. But now I have to avoid it as I walk in the store because if I buy it one more time I'll have a habit. And I'm afraid to look at the list of ingredients.