You know you're getting old when you don't care where your spouse goes, just as long as you don't have to go along. You know you're getting old when ' getting lucky ' means you can find your car in the parking lot. Middle age is when work is a lot less fun - and fun is a lot more work.. Middle age is when it takes longer to rest than to get tired. Middle age is having a choice of two temptations and choosing the one that will get you home earlier. A man has reached middle age when he is cautioned to slow down by his doctor rather than the police.