Normal for My Age

I always feel better when my doctor says something is normal for my age, but then think dying will also be normal for my age at some point.

Age
Doctor
Die
Medical
Point
Health

Explanation

Explain Bear

Hey, numbskull! The "joke" is that getting old sucks. The doctor says stuff is normal, which makes you feel okay, but then you realize dying is also normal when you're old. It's dark because, well, death. And you? You'll probably forget where you parked your car today, you goof!