You have a special super power in the first months of your baby’s life. maybe this falls into the very large bucket of “nobody ever told me this was going to happen.” Your boobs might get all tingly for no apparent reason. For me, it could be triggered by
hearing any baby cry
having any emotion at all (sadness, confusion, joy, whatever)
reading a menu and seeing hot chocolate was listed
So, my tip is that if you start to get a funny feeling in your chest when you read a menu, you are probably biologically programmed to neeeeed that very food. buy that hot cocoa (or whatever your boobs want) and enjoy!