Went grocery shopping hungry and over spent

I went to the grocery store and had a list of items that I was going to buy. I usually shop around about the 12th of every month. I go in and see everything I want and thinking: how I would like to fix me a big juicy hamburger. Then, throwing snacks for night I end up with potatoe chips, cookies, t-bone steaks and the next thing you know. I HAVE A BIG GROCERY BILL. what did I get? nothing to last for a month because I went in HUNGRY! Have anyone experienced this? If so how many times?