If your dad (or husband) is like most, they hear about half of what's said to them. The rest of it goes in one ear and straight out the other. It's either because their hearing is fading due to old age or they simply don't want to be bothered by your nonsense. Either way, this greeting card was left blank on the inside leaving plenty of space for you to write in your own custom message for that special someone. They may seemingly have removable ears or be hard at hearing but as long as they've got their eyes they'll be able to read whatever you write. Put a smile on their face and maybe they'll start listening when you're talking.