I don't think this is true for most people. I will eat food that has meat in it if it's just going to go bad or be thrown away, but that's extremely rare and it's the same as I remember it from when I used to eat it. So probably once every 1-3 years. maybe it would be different if it was like 10+ years. Definitely with milk it is immediately obvious anything that has it and it tastes pretty gross now.