I couldn't have said it better
In his book FOLK PSALMS OF FAITH, Ray Stedman tells of an experience H.A. Ironside had in a crowded restaurant. Just as Ironside was about to begin his meal, a man approached and asked if he could join him. Ironside invited his to have a seat. Then, as was his custom, Ironside bowed his head in prayer. When he opened his eyes, the other man asked, "Do you have a headache?" Ironside replied, "No, I don't." The other man asked, "Well, is there something wrong with your food?" Ironside replied, "No, I was simply thanking God as I always do before I eat."
The man said, "Oh, you're one of those, are you? Well, I want you to know I never give thanks. I earn my money by the sweat of my brow and I don't have to give thanks to anybody when I eat. I just start right in!"
Ironside said, "Yes, you're just like my dog. That's what he does too!"
- Ray Stedman, Folk Psalms of Faith.