At the pediatrician's office for his 9 year physical.
Pediatrician: "So Jagger, is there anything you would like to discuss? Any concerns?"
Jagger: "I'm having issues with short term memory loss and I'm pretty sure I'm turning into a dog."
Pediatrician: "Okay....Why do you believe you're turning into a dog?"
Jagger: "I'm 9. And 9 x 7 = 63. So I'm 63 in dog years. I've started forgetting things and that's around the same time old people start forgetting things. I'm just forgetting things in dog years."