If age is just a number, why can not I pick the number that I want instead of everyone going out of their way to remind me about how old I am?

Happy birthday, happy birthday. Why does everyone have to keep reminding me that it’s my tenth birthday. I know that they are trying to be nice, but do they realize how old I am in dog years. According to the math I am, I am…, I am….., oh never mind how old I am. I will just stick with how old I am in human years and forget how old I am in dog years. And if you believe the new science, all I have to do is say that I am ten, and that makes me ten. I sure hope that old age and death catch up with science so I can be young, handsome, and healthy forever. And then I will never have to fear another birthday ever again.