52. Which is when I stopped sleeping soundly through the night, just to go to the restroom. Once the prostate cannot hold an all-nighter, you are technically an old man in my book.I turned 48 today, yes I was born on Day of the Dead in Mexico. I don't feel old but I have noticed my back hurts a bit after leaning over and working on my car. I have hair where I don't need it and none where I do. At what age did you guys start to feel old?